The Paranormal Initiative
Investigation Development Series
Field Encyclopedia
Official Field Encyclopedia · Complete Edition · 4 Volumes · 18 Sections

Official Field
Encyclopedia

The comprehensive field reference of The Paranormal Initiative. Covers haunting and phenomenon classification, the complete entity and spirit index, equipment and environmental science, and TPI investigation standards. Written for disciplined investigators — not for drama, for documentation.

◈ 4 Volumes
◈ 18 Sections
◈ Field notes & cautions
◈ TPI official standards
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I
Volume One
Haunting & Phenomenon Classification
Sections 1–2 · Haunting types, the official TPI claim taxonomy
Section 1
Haunting Classifications
Intelligent Haunting
Haunting Type
Reported activity that appears aware of and responsive to the presence of living persons. The defining characteristic is apparent reaction — a sound that answers a question, an object that moves on request, a change in environment that correlates to an action or statement. Intelligent activity is the rarer and more significant classification. It requires thorough documentation, multi-source corroboration, and rigorous ruling-out of coincidence before any meaning can be assigned.
Subtypes
Direct Response
Apparent reaction to spoken words or commands.
Interactive Movement
Objects or lights appear to respond to touch or proximity.
Escalating Engagement
Intensity increases in apparent reaction to investigative presence or emotional climate.
Field Note

Apparent responsiveness is easily produced by coincidence, confirmation bias, and suggestion. Intelligent classification should never rest on a single event. Corroborate across multiple sessions, multiple investigators, and multiple instruments.

See Also
Residual HauntingConfirmation Bias
Residual Haunting
Haunting Type
Reported activity that appears to replay without variation, without awareness of observers, and without any response to attempts at interaction. The phenomenon is theorized as an environmental imprint — energy or information somehow retained by materials or space — rather than a conscious presence. Classic residual presentations include a figure walking the same path and disappearing at the same point, or a sound repeating at the same time in the same location.
Subtypes
Looping Visual
Repeated apparition following an identical path.
Looping Audio
Repeated sound at same time or location.
Looping Event
A full sequence of activity replaying in order.
Field Note

Confirmed residual cases are rarer than popular culture suggests. Many reports described as residual are later traced to building structure — timed appliances, pipe patterns, or regular wildlife activity. Document multiple occurrences before applying this classification.

See Also
Intelligent HauntingThermal ExpansionHVAC Noise
Poltergeist Activity
Haunting TypeHigh Scrutiny
Reported physical disturbances attributed to an unseen intelligence or force — object movement, object throwing, impact sounds, and interference with electronics. Unlike typical haunting phenomena, poltergeist cases are historically associated with a specific person rather than a specific location, and activity often diminishes when that individual is removed. Thorough investigation must examine the psychological and physiological environment of all household members.
Subtypes
Object Displacement
Items found in different positions with no confirmed cause.
Object Projection
Items reportedly thrown or propelled.
Electrical Interference
Lights, devices, and appliances behaving erratically without wiring cause.
Sustained Auditory Disturbance
Knocking, rapping, scratching without locatable structural source.
⚠ Caution

Poltergeist classification is among the most frequently premature in investigation. Before applying it, fully rule out structural causes, pest activity, sleep and stress disorders, and all psychological factors in household members.

See Also
Ideomotor EffectSleep DeprivationP-1 Object Displacement
Crisis Apparition
Haunting TypeVisual
A reported visual, auditory, or sensory experience of a specific known person occurring at or near the time of that person's death, injury, or crisis — typically perceived by someone physically distant from the event. Crisis apparitions are among the most consistently documented phenomena in paranormal literature across centuries and cultures. They are categorically distinct from location-based hauntings.
Field Note

The time of the experience must be documented independently and compared against confirmed events. Time correlation is the essential element of this classification. Without it, the report cannot be meaningfully evaluated.

See Also
ApparitionDeathbed Apparition
Location-Based Haunting
Haunting Type
Activity consistently tied to a specific property, structure, or piece of land regardless of who occupies it. Multiple unconnected witnesses across different time periods reporting consistent experiences in the same location provides the strongest foundation for this classification.
See Also
Residual HauntingIntelligent Haunting
Object-Based Haunting
Haunting Type
Reported activity that follows a specific object — furniture, jewelry, artwork, heirloom, or artifact — from one location to another. Investigation must document whether the reported activity predates or postdates the object's arrival at each location.
⚠ Caution

Object attribution is difficult to establish and easy to assume. The correlation between an object's presence and reported activity does not establish causation. Rule out all environmental factors at each location independently.

Person-Based Haunting
Haunting Type
Reported activity that follows a specific living individual regardless of their location. Investigation requires comprehensive documentation of the individual's movements, sleep patterns, stress levels, mental health history, and medical background before this classification is applied.
See Also
Poltergeist ActivityHypervigilance
Induced / Facilitated Haunting
Haunting TypeHandle With Care
A theoretical classification applied to cases in which activity appears to have been initiated or amplified by deliberate actions of the occupants — use of divination tools, invitation rituals, séances, or sustained focused attention. Documenting the timeline of activity relative to any such actions is essential.
⚠ Caution

This classification requires exceptional care. Suggesting to a client that their own actions caused activity can cause significant psychological harm. Document the timeline; do not assign blame.

Active Haunting
Case Status
A case in which reports are current, ongoing, and recurring. Active cases receive the highest scheduling priority.
Dormant Haunting
Case Status
A case in which reported activity has ceased or significantly reduced. Historical documentation remains valuable. Dormant cases sometimes reactivate following structural renovations, change of occupants, or significant life events affecting the household.
Section 2
TPI Claim Classification System
The official claim taxonomy of The Paranormal Initiative. Every reported phenomenon should be classified using this system in case documentation. Classifications are organizational tools — not conclusions.
V
Visual Claims
V-1Full-Body Apparition
Visual
A report of a complete, recognizable human form perceived directly or captured on recording equipment.
Document
  • Time, location, duration, lighting conditions
  • Witness position, direct vs. peripheral observation
  • Movement observed, camera coverage
V-2Partial Apparition
Visual
A report of a visible portion of a human form — hands, legs, torso, or head — without the complete figure.
Document
  • Which portion, duration, lighting
  • All reflective surfaces in the space
V-3Shadow Figure
Visual
A report of a dark, human-shaped silhouette without visible features, typically in peripheral vision or low-light conditions.
Document
  • Direct vs. peripheral observation, movement
  • Known light sources and positions, reflective surfaces
See Also
Shadow PeopleHat ManThe Watcher
V-4Mist or Vapor Anomaly
Visual
A reported or captured low-lying or drifting fog-like form without a confirmed source.
Document
  • Temperature and humidity at time of capture
  • All investigator positions, HVAC activity, breath visibility
V-5Light Anomaly
Visual
An unexpected light event — orb, flash, streak, glow — captured on camera or observed directly without a confirmed source.
Document
  • Camera settings, humidity, distance to nearest reflective surface
  • IR illuminator positions, all light sources in the space
⚠ Caution

Orbs are the lowest-value visual capture. The overwhelming majority are dust, moisture, insects, or lens artifact. Never present an orb as evidence without independent corroboration.

See Also
Dust / Moisture OrbsLens Flare
V-6Vortex Anomaly
Visual
A swirling or funnel-shaped light or mist form captured on video or photography.
⚠ Caution

Camera strap, hair, and debris in the lens field cause the majority of vortex captures. Check for obstructions before elevating this capture.

See Also
Camera Strap Artifacts
V-7Apparition on Recording Only
Visual
A form visible in recorded media that was not perceived by any investigator at the time of capture.
Document
  • All conditions at time of recording
  • Review camera IR artifacts, motion blur, and background reflections before elevating
See Also
Motion BlurPareidolia
A
Auditory Claims
A-1Disembodied Voice (Direct)
Auditory
A voice or vocalization heard by one or more investigators without any recording device capturing it.
Document
  • Exact words if any, volume, tone, number of witnesses
  • All ambient sound sources, room layout
A-2Electronic Voice Phenomenon (EVP)
AuditoryPrimary Evidence
Audio captured on a recording device that contains apparent speech or vocalization not heard at the time of recording. This is the primary auditory evidence category.
EVP Classes
Class A
Clear, intelligible, broadly agreed upon by multiple independent reviewers without prompting.
Class B
Partially intelligible. Some reviewers confirm content without prompting; others cannot.
Class C
Ambiguous. Agreement only reached after suggestion or prompting. Should not be presented as evidence.
See Also
EVP Classification StandardAudio PareidoliaCompression Artifacts
A-3Footsteps / Movement Sound
Auditory
Reported sounds resembling footfall, dragging, or physical movement without a visible source.
Document
  • Floor material and construction, building age
  • All wildlife access points, investigator positions
See Also
Thermal ExpansionBuilding Settlement
A-4Impact Sound — Single
Auditory
A single knock, bang, or impact without a confirmed source.
Document
  • All known structural sounds for the building
  • HVAC status, pipe locations, exterior conditions
A-5Impact Sound — Repetitive
Auditory
A pattern of knocking, rapping, or tapping without a confirmed source. Note whether the pattern appears to respond to investigator interaction — if so, reclassify as A-7.
A-6Unexplained Melody or Music
Auditory
A reported or recorded melody, humming, or musical sound without a confirmed source.
Document
  • All electronics in the space and neighboring units
  • HVAC resonance, building acoustics
A-7Responsive Audio
AuditoryHigh Value
A sound that appears to occur in direct response to a question, statement, or action by an investigator.
Document
  • The precise question or action, time elapsed before the response
  • All environmental conditions. Cross-reference with V and E categories.
A-8Infrasound Presence
AuditoryEnvironmental
Detection of sub-20 Hz sound frequencies in a location, noted alongside reports of unease, dread, or sensory disturbance.
Document
  • Measurement equipment used, frequency and amplitude of readings
  • HVAC and industrial sources in the area
See Also
Infrasound (HVAC-Generated)X-2 Oppressive Atmosphere
P
Physical Interaction Claims
P-1Object Displacement
Physical
An object found in a different position or location than where it was placed, without a confirmed explanation.
Document
  • Object's confirmed starting position with photograph
  • All persons with access, surface stability, vibration sources, air movement
P-2Object Projection
Physical
A report that an object was visibly thrown or propelled through the air without a known cause.
Document
  • All witness positions and sightlines, camera coverage of the area
  • Object weight and surface
P-3Apport
Physical
A report that an object disappeared from one location and appeared in another, sometimes in a sealed or inaccessible space.
Document
  • All access to the location. Memory errors and unreported handling are the most common explanations.
P-4Physical Contact Report
Physical
A witness report of being touched, grabbed, pushed, or restrained by an unseen force.
Document
  • Witness's exact position, any physical marks (photograph immediately)
  • Clothing worn, all investigator proximity
P-5Physical Mark
PhysicalDocument Carefully
A scratch, bruise, welt, or impression appearing on a person during or shortly after investigation.
Document
  • All marks photographically with timestamp and ruler for scale
  • Note all skin conditions, recent activities, and whether marks were present before the session
⚠ Caution

Psychosomatic dermatographia — skin marking in response to stress — is well documented and must be considered before this claim is elevated.

P-6Door or Window Movement
Physical
A report of a door, window, cabinet, or drawer opening, closing, or moving without a known cause.
Document
  • Door hardware condition, floor levelness
  • Air pressure differentials, draft sources, HVAC activity
E
Environmental Claims
E-1Temperature Anomaly — Cold
Environmental
A localized, measured temperature significantly below ambient baseline in a documented clean zone.
Document
  • Baseline temperature for the area, HVAC activity
  • All drafts and gaps, exterior wall proximity, measurement device used
E-2Temperature Anomaly — Heat
Environmental
A localized, measured temperature significantly above ambient baseline without a confirmed heat source.
Document
  • Baseline temperature, HVAC activity
  • All electronics, pipes, and structural heat sources
E-3EMF Anomaly
Environmental
An electromagnetic field reading in a documented clean zone that exceeds baseline levels without an identified source.
Document
  • Baseline EMF for the area, all electrical sources
  • Device positions, investigator proximity with personal electronics
See Also
Triaxial EMF MeterFaulty Wiring
E-4Electrical Disturbance
Environmental
Unexplained flickering lights, erratic electronics, rapid battery drain, or devices activating without input.
Document
  • Building wiring age and known condition, battery age and quality
  • All fuse box proximity, any known electrical issues
E-5Unexplained Odor
Environmental
A reported scent — floral, sulfurous, musky, perfume-like, smoke-like, or organic — without a confirmed source.
Document
  • All materials, cleaning products, and organic matter in the space
  • Plumbing and HVAC, wildlife evidence, building history
E-6Pressure Sensation
EnvironmentalExperiential
A reported feeling of pressure in the ears, chest, or on the body without a confirmed physical cause.
Document
  • Atmospheric pressure conditions, HVAC activity
  • Infrasound potential (A-8), witness medical history
E-7Air Movement Anomaly
Environmental
A reported or measured air movement without a confirmed source — a draft in a closed room, a cold breath sensation with no occupant nearby.
Document
  • All vents, gaps, windows, HVAC status, and exterior conditions
X
Psychological & Experiential Claims
X-1Sensed Presence
Experiential
A report of perceiving an unseen presence, watcher, or entity without visual, auditory, or physical confirmation.
Document
  • Witness psychological baseline, location conditions
  • Infrasound potential, EMF levels at the location
See Also
Temporal Lobe SensitivityInfrasound
X-2Oppressive Atmosphere / Dread
Experiential
A reported intense, overwhelming feeling of fear, wrongness, or threat in a specific area.
Document
  • Witness anxiety baseline, environmental conditions, lighting
  • Infrasound potential, CO levels if possible
See Also
Carbon MonoxideA-8 Infrasound
X-3Emotional Surge
Experiential
A sudden, disproportionate emotional response — grief, rage, joy, sadness — in a location without an obvious personal trigger.
Document
  • Location, time, witness's personal connections to the space
  • All environmental conditions
X-4Dizziness / Nausea / Disorientation
ExperientialSafety Priority
Physical symptoms reported during investigation without a confirmed medical cause.
⚠ Safety Priority

Rule out carbon monoxide poisoning, mold exposure, poor ventilation, and hypoglycemia before documenting as experiential claim. If CO is suspected, evacuate immediately.

See Also
Carbon MonoxideMold Exposure
X-5Peripheral Movement
Experiential
A report of perceived movement in peripheral vision that disappears when looked at directly.
Document
  • Lighting conditions, reflective surfaces, investigator positions
  • Fatigue level at time of report
See Also
Sleep DeprivationPareidolia
X-6Dream or Sleep-State Experience
Experiential
A reported contact experience occurring during sleep — visitation, communication, presence. Outside the scope of on-site investigation but documented during intake for case history.
R
Pattern-Based Claims (Recurrent)
R-1Time-Specific Recurrence
Pattern
Activity reported repeatedly at the same time of day or night across multiple witnesses or sessions.
Document
  • All reported times, environmental conditions at those times
  • HVAC cycles, external traffic, structural temperature changes
R-2Location-Specific Recurrence
Pattern
Activity reported repeatedly in the same specific location regardless of who is present.
Document
  • All environmental factors unique to that location across all reported instances
R-3Person-Specific Recurrence
Pattern
Activity that consistently escalates, changes, or occurs in proximity to a specific individual.
Document
  • All instances, individual's positions, psychological and health history
R-4Trigger-Specific Recurrence
Pattern
Activity that consistently follows a specific action, object, word, or event.
Document
  • All trigger instances and the preceding conditions
R-5Seasonal or Calendar Recurrence
Pattern
Activity reported by multiple unconnected witnesses to increase at specific times of year.
Document
  • All reported dates, any historical events connected to those dates
  • Structural and environmental factors that change seasonally
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II
Volume Two
Entity & Spirit Classification System
Sections 3–8 · Human-origin, non-human, shadow beings, demonology, angelic, cultural traditions
This volume catalogs how entities, spirits, and non-human phenomena are classified across paranormal investigation, religious traditions, and cultural frameworks worldwide. These entries document reported classifications, theoretical frameworks, and cultural beliefs — not assertions of fact. Investigators use this volume to understand what clients may be experiencing and to communicate with appropriate precision.
Section 3
Human-Origin Entity Classifications
Ghost
Human-Origin
The most broadly used term for a reported presence believed to be the consciousness, personality, or energy of a deceased person. The word ghost implies a continuing connection to the physical world — most commonly a specific location, person, or unresolved situation.
Subtypes
Aware Ghost
Appears conscious of the living, may communicate.
Unaware Ghost
Does not acknowledge the living, repeats behavior — often residual.
Anchored Ghost
Strongly bound to a specific place or object.
Wandering Ghost
No clear location-anchor, encountered in multiple places.
See Also
Residual HauntingIntelligent HauntingEarthbound Spirit
Spirit
Human-Origin
Often used interchangeably with ghost, though some traditions draw a distinction. In many frameworks, spirit implies greater awareness, intentionality, and mobility than ghost. A spirit may be associated with a location, a lineage, or a purpose rather than a specific unresolved event.
Earthbound Spirit
Human-Origin
A theoretical classification for a human consciousness that has not transitioned beyond the physical realm after death. Often reported in cases involving sudden or traumatic death, strong emotional attachment to a place or person, or unresolved circumstances.
Field Note

Earthbound classification is theoretical and should be used carefully in client communication. Applying it without strong basis can cause unnecessary distress.

Apparition
Human-OriginVisual
As a category, apparition refers to the visual or sensory manifestation of an entity rather than the entity itself. For full classification, see Section 2 — Visual Claims (V-1 through V-7).
See Also
V-1 Full-Body ApparitionV-2 Partial ApparitionCrisis Apparition
Doppelgänger
Human-OriginMedical First
A reported visual phenomenon in which a witness perceives a duplicate of themselves or of a living person known to them. Most reports are explained by stress, sleep deprivation, dissociation, or medical factors.
⚠ Caution

Always investigate medical and psychological explanations before documenting as paranormal. Document thoroughly and refer the witness to appropriate support.

Fetch
Human-OriginBritish / Irish
A term from British and Irish folk tradition for an apparition of a living person seen by someone who knows them, often interpreted as an omen of that person's death. Related to the crisis apparition category. The fetch appears before the death rather than at or after it.
See Also
Crisis ApparitionWraith
Wraith
Human-OriginEuropean
A figure perceived as a ghostly duplicate of a living or recently deceased person, typically associated with impending death. Appears in Scottish and broader European folk tradition.
Revenant
Human-OriginEuropean Folklore
From European folklore — a deceased person believed to have returned from the dead in a physical or semi-physical form. Often associated with unfinished business, vengeance, or a failure of proper burial rites. Rarely used in modern paranormal investigation but relevant for historical case context.
Ancestor Spirit
Human-OriginPan-Cultural
Across many world traditions, spirits of deceased family members or lineage ancestors who maintain an active relationship with their living descendants — offering protection, guidance, or warning. Appears in African traditional religions, Indigenous American traditions, East Asian ancestor veneration, and many others. Ancestor spirits are typically not considered threatening unless neglected or disrespected according to the traditions of their culture.
See Also
Ancestor VenerationOrisha
Deathbed Apparition
Human-Origin
A reported visual or sensory experience — typically of a deceased loved one or a luminous presence — perceived by a person at or near the time of their own death. Deathbed experiences are among the most widely documented cross-cultural phenomena and are reported consistently across religious, secular, and cultural backgrounds.
Field Note

These experiences are not typically investigation subjects. They are relevant for intake context when a client's reported activity began following the death of a household member.

Section 4
Non-Human Entity Classifications
Inhuman Entity
Non-HumanHighest Scrutiny
An entity believed to have never been human — not a ghost, not an ancestor, but a distinct order of being. This is among the most serious classifications in paranormal investigation and carries the highest responsibility for accuracy and caution. Inhuman entity cases require exceptional documentation, multi-investigator consensus, and the thorough exhaustion of all other explanations before this classification is documented.
⚠ Caution

Misclassification of a human-origin haunting, a psychological condition, or an environmental phenomenon as an inhuman entity can cause profound and lasting harm to clients. This label should not be applied without extraordinary evidence.

Elemental
Non-Human
A class of entity believed to be associated with or composed of natural forces — earth, air, fire, water, or combinations thereof. Elemental entities appear in European occultism (particularly the Paracelsian tradition), Indigenous traditions worldwide, Eastern spiritual systems, and New Age frameworks.
Classical Subtypes (Paracelsian)
Gnome
Earth. Associated with stability and underground places.
Sylph
Air. Associated with movement and high places.
Salamander
Fire. Associated with heat and transformation.
Undine
Water. Associated with rivers, lakes, and the sea.
Field Note

Reports of elemental activity often involve strong environmental sensations rather than visual apparitions — a sense of ancient presence, feeling drawn or repelled from a specific natural feature, strong emotional shifts near water or in forests.

Nature Spirit
Non-Human
Distinct from elementals in that nature spirits are associated with a specific place, feature, or organism — a particular tree, river, mountain, or field — rather than an elemental force category. Appear in virtually every world tradition. Well-documented in Japanese Shinto (kami), Celtic animism, Indigenous American traditions, and African traditional religions.
See Also
KamiThe Fair FolkGenius Loci
Genius Loci
Non-Human
From Latin — the spirit of a place. The presiding spirit or protective entity of a specific location. In Roman tradition, every location had a genius loci. Modern investigative use refers to a powerful, location-anchored presence that seems to embody the character of a space rather than the memory of a specific person.
Section 5
Shadow Being Classifications
Shadow beings constitute one of the most consistently reported categories of visual phenomena across global paranormal investigation. Unlike traditional apparitions, shadow figures are typically perceived as dark, non-luminous, and fundamentally unlike the memory of a specific person.
Shadow People
Shadow BeingVisual
Dark, human-shaped figures perceived in peripheral vision or low-light environments. Distinguished from apparitions by their complete absence of visible features, their apparent three-dimensional solidity, and their behavior — they typically move quickly, appear briefly, and vanish when observed directly.
See Also
V-3 Shadow FigureHat ManThe Watcher
The Hat Man
Shadow BeingVisual
A specific shadow figure archetype reported internationally by witnesses with no connection to each other — a tall, dark figure wearing a wide-brimmed hat, often described as radiating malevolence. One of the most remarkable aspects of Hat Man reports is their cross-cultural consistency. The figure appears in accounts from North America, Europe, Australia, and South America with near-identical descriptions. The archetype predates internet communication.
Important

Do not suggest the hat detail to a witness before they describe it themselves. If they volunteer it unprompted, document it exactly.

The Watcher
Shadow BeingVisual
A shadow figure that stands stationary rather than moving — typically at a doorway, at the foot of a bed, or in a corner — and appears to observe the witness without interaction. Associated with feelings of paralysis or inability to look away.
Field Note

Many Watcher reports occur during hypnagogic or hypnopompic states — the transitions between waking and sleep. This does not automatically invalidate the experience but must be documented.

Shadow Animal
Shadow BeingVisual
A dark, animal-shaped figure — most commonly a large dog, cat, or wolf shape — without visible features. Appears in Celtic and European traditions as a death omen (Black Shuck, Black Dog), in Native American traditions as various spirit animals, and in modern reports worldwide.
See Also
Black Dog
The Hooded Figure
Shadow BeingVisual
A shadow figure perceived as wearing a hood or robe. Often associated with doorways, staircases, and places of transition. Appears consistently in independent reports across many cultures.
Shadow Masses / Amorphous Shadow
Shadow BeingVisual
A formless dark mass with no discernible human or animal shape, perceived moving, pooling, or crawling. Distinct from standard shadow figures by its lack of defined outline.
Section 6
Demonology
Demonology is one of the most misunderstood areas in paranormal investigation. Television has done significant damage by sensationalizing demon classifications and applying them recklessly. This section presents demonic classifications from a scholarly, cross-cultural perspective — covering the major traditional systems and their investigative relevance without sensationalism.
Demonology
Academic
The academic and theological study of demons, evil spirits, and malevolent entities across religious and cultural traditions. In investigative context, demonology provides a framework for understanding severe cases involving persistent, escalating, threatening phenomena that do not fit human-origin classifications.
Stages of Reported Demonic Activity
Western FrameworkHigh Scrutiny
The most widely referenced classification system in American and European paranormal investigation. Drawn from Catholic theological tradition and should be understood in that context.
Three Stages
Stage 1 — Infestation
The presence establishes itself in a location. Unusual sounds, foul odors, cold spots, objects moving, pervasive unease. Investigators most likely encounter a case at this stage.
Stage 2 — Oppression
The presence begins to affect the individuals in the location — nightmares, physical symptoms, emotional disturbance, behavioral changes, deteriorating relationships.
Stage 3 — Possession
Reported direct control of a person. Outside the scope of standard investigation. Requires immediate referral to appropriate religious or mental health resources.
⚠ Investigative Note

The majority of cases reported as demonic are better explained by severe psychological disturbance, environmental factors, or intense human-origin hauntings misclassified under media influence. Apply demonic classification only after exhausting every other explanation.

Goetic Tradition (Ars Goetia)
Historical Reference
A 17th-century grimoire cataloging 72 spirits organized by rank. Widely referenced in occult and paranormal contexts. Knowledge of these names is relevant when clients reference them, when written material related to these figures is found at a location, or when the history of a property involves occult practice.
Major Named Figures
Baal (Ba'al)
High king. Associated with thunder and war in Canaanite origin; absorbed into Western demonology as a king of Hell.
Paimon
King of the West. Associated with knowledge, arts, and secrets.
Asmodeus
Demon of lust and destruction. Appears in the Book of Tobit.
Belial
Associated with lawlessness, deception. One of the most referenced in biblical texts.
Beelzebub
"Lord of the Flies." Appears in both Hebrew scripture and the New Testament. Considered a high-ranking prince of Hell.
Leviathan
A chaos serpent from Hebrew scripture, later classified as a demon of envy.
Mephistopheles
A demon of German legend. Associated with deals and intellectual corruption. Best known through the Faust story.
Lucifer
In Christian theology, the fallen angel. Distinct in some traditions from Satan as a title rather than a name.
Satan
The Adversary. Appears across Abrahamic traditions as an opposition force to divine order.
⚠ Note

These names should never be used to sensationalize or dramatize a case. They are reference terms for academic and contextual use only.

Jinn (Islamic Tradition)
Non-HumanIslamic
Beings of smokeless fire created before humanity. Jinn are not inherently demonic — they exist in a spectrum from benevolent to malevolent and have free will, as humans do. The Iblis (Shaitan) is the Jinn who refused to bow before humanity and became the adversarial figure in Islamic theology.
Types
Ifrit (عفريت)
Powerful, cunning jinn. Associated with vengeance, ancient places, and subterranean spaces.
Marid (مارد)
The most powerful class. Associated with the sea and with granting wishes.
Si'la (سعلاة)
Shapeshifting jinn capable of assuming any form.
Ghul (غول)
Associated with graveyards, consuming the dead, and shapeshifting. The source of the English word "ghoul."
Qareen
A spirit double assigned to every human being at birth — a personal jinn companion. Relevant to possession-adjacent reports.
Asura
Non-HumanHindu / Buddhist
Power-seeking beings who exist in opposition to the devas (divine beings) in Hindu and Buddhist traditions. Not equivalent to Western demons — asuras are powerful, sophisticated entities defined by their pursuit of power rather than by pure malevolence.
Oni
Non-HumanJapanese
Powerful supernatural beings associated with disease, disaster, and misfortune in Japanese tradition. Large, fearsome, often depicted with horns and clubs. Some oni traditions have them serving as enforcers in the underworld. Complex figures — not simply evil.
Rakshasa
Non-HumanHindu / Buddhist
Powerful beings associated with illusion, deception, and predation in Hindu and Buddhist traditions. They are shapeshifters, capable of appearing beautiful before revealing their true nature.
Incubus / Succubus
Non-HumanMedical First
Entities from medieval European tradition believed to interact with people during sleep. Modern investigators most often encounter these claims as descriptions of sleep paralysis experiences, which have a well-documented neurological basis.
⚠ Caution

Sleep paralysis with hallucination is extremely common and closely mimics historical incubus/succubus reports. Refer clients experiencing this to medical professionals before any paranormal classification is applied.

Section 7
Angelic & Divine Messenger Classifications
Angel (General)
Divine Messenger
A messenger or divine servant. The word angel derives from the Greek angelos, meaning messenger. In Abrahamic traditions, angels are divine beings created to serve as intermediaries between the divine and human realms. Relevant in cases where clients report protective experiences, unexplained assistance, or visitations of a benevolent nature.
Angelic Hierarchy (Pseudo-Dionysian System)
Western Christian
The most widely referenced organizational framework in Western demonology and paranormal literature. Three spheres, nine orders.
First Sphere — Closest to the Divine
Seraphim
The highest order. Associated with divine fire and ceaseless worship. Described in Isaiah with six wings.
Cherubim
Guardians of divine presence and divine knowledge. Classical Cherubim are fearsome, four-winged, four-faced beings — not the chubby infants of popular culture.
Thrones
Divine vehicles or foundations of justice. Described in Ezekiel as wheel-like forms covered in eyes.
Second Sphere — Divine Governance
Dominions
Regulate angelic duties and govern lower orders.
Virtues
Bestow blessings, govern the movement of heavenly bodies.
Powers
Guard against demonic incursion. Warriors of the divine order.
Third Sphere — Working with Humanity
Principalities
Guardian beings over nations, cities, and large institutions.
Archangels
Michael (warrior, protector), Gabriel (messenger), Raphael (healer), Uriel (wisdom, fire). Additional archangels vary by tradition.
Angels
The most numerous order. Individual guardian spirits, messengers, and divine emissaries.
Watchers (Book of Enoch)
Divine
A class of angels assigned to observe and guide humanity who, in the Book of Enoch, descended to earth and took human companions. Also called the Grigori — considered fallen in this tradition. Note: the term "Watcher" in shadow figure classification (Section 5) comes from a different root.
Devas
DivineHindu / Buddhist
Divine beings associated with natural forces, aspects of the cosmos, and divine principles in Hindu and Buddhist traditions. Vastly complex and varied — deva simply means "shining one" and encompasses beings of many types, from great cosmic deities to minor nature spirits. Not equivalent to angels but occupy a similar structural role in their traditions.
Section 8
Cultural Spirit Traditions
This section documents how spirits, entities, and paranormal phenomena are understood across major world traditions. These entries are written with the deepest respect for living traditions. Where a community has indicated that certain knowledge is sacred and not appropriate for public documentation, that boundary is honored. This is a cultural context reference for investigators — not a complete or authoritative account of any tradition.
JP
Japanese Traditions
Yurei (幽霊)
JapaneseGhost
The Japanese ghost. A Yurei is the spirit of a person who died with strong emotions — grief, love, jealousy, vengeance — that prevented proper passage into the afterlife. Typically anchored to the location of their death or the object of their emotional attachment.
Subtypes
Onryo (怨霊)
Vengeful spirit, often female, associated with drowning or betrayal. The archetype behind modern figures like Sadako.
Goryō (御霊)
Spirit of a powerful or noble person who died unjustly. Capable of causing large-scale disasters.
Funayūrei (船幽霊)
Spirits of those who died at sea.
Zashiki-warashi (座敷童子)
A child spirit inhabiting old houses. Brings fortune if treated well, misfortune if offended.
Yokai (妖怪)
JapaneseNon-Human
A broad category of supernatural entities, monsters, spirits, and strange phenomena in Japanese folklore. Yokai are not ghosts — they are their own category of being, ranging from mischievous to dangerous.
Notable Types
Kappa
Water entity associated with rivers.
Kitsune
Fox spirit with shapeshifting and trickster qualities. Also potentially protective.
Tengu
Mountain entity associated with martial arts and arrogance.
Gashadokuro
Giant skeleton formed from the spirits of those who starved in war.
Kami (神)
Japanese / ShintoDivine
The divine spirits of Shinto tradition. Kami inhabit and animate everything — mountains, rivers, trees, storms, animals, and honored ancestors. Kami are not ghosts and are not demons. They are presiding spiritual essences. Disrespect for a kami's associated place or object may result in misfortune.
Hitodama (人魂)
JapaneseVisual
Balls of fire or light believed to be the souls of the recently deceased. Often described as blue or white flames floating near graveyards or places of death. A cultural framework for some light anomaly reports.
See Also
V-5 Light Anomaly
CN
Chinese Traditions
Gui (鬼)
ChineseGhost
The Chinese ghost. The spirit of a person who died with strong grievances, without proper burial rites, without descendants to perform ancestor veneration, or far from home. Hungry ghosts — who died without family or are not properly fed through ritual offerings — are the most commonly feared category.
E Gui (饿鬼) — Hungry Ghost
Chinese / BuddhistGhost
A spirit consumed by unsatisfied craving. In Buddhist cosmology, a being in the Hungry Ghost realm is tormented by perpetual hunger that can never be satisfied. In folk tradition, hungry ghosts are those who died suddenly, without family, or whose rites were not performed.
Jiangshi (僵尸)
Chinese
A Chinese hopping vampire or reanimated corpse. Relevant to investigation context when working with clients from Chinese or Southeast Asian backgrounds who use this framework to describe physical disturbances or a sense of threatening presence.
IN
Hindu & Vedic Traditions
Preta
Hindu / SanskritGhost
The Sanskrit equivalent of the hungry ghost. A spirit of someone who died before their time or without proper rites, condemned to wander for a period before receiving liberation.
Pishacha
HinduNon-Human
A flesh-eating entity in Hindu tradition associated with burial grounds and dark places. Unlike the Preta, Pishacha are considered non-human entities that predate on the living.
Bhuta
HinduGhost
The spirit of a person who died a violent, sudden, or unclean death and has not passed on. Associated with impurity and contamination. Feared in many South Asian communities and directly relevant in intake interviews with clients from these backgrounds.
Vetala
Hindu
A spirit that inhabits corpses. Associated in Hindu tradition with magic, knowledge, and twilight states. Appears in the Baital Pachisi stories, where a vetala poses riddles to a king from within a corpse.
Yaksha / Yakshini
Hindu / BuddhistNature Spirit
Powerful nature spirits associated with wealth, fertility, and the earth. Appear across Hindu and Buddhist traditions and can be protective or dangerous depending on how they are encountered.
AF
African & Diaspora Traditions
Orisha
Yoruba / DiasporaDivine
Divine forces and intermediaries in Yoruba tradition and its diaspora forms (Candomblé, Santería, Vodou). Orishas are associated with natural forces, human activities, and aspects of life and death. They are not demons — they are complex divine beings with specific personalities, domains, and relationships with humanity.
Major Orishas
Eshu / Exu
Crossroads, communication, trickster. Frequently misrepresented as demonic in Western accounts — this is a profound misunderstanding.
Ogun
Iron, war, labor.
Shango
Thunder, lightning, justice.
Yemoja
Ocean, mothers, children.
Oshun
Fresh water, love, fertility.
Oya
Storms, death, transformation.
⚠ Investigative Note

Do not classify an Orisha encounter as a demonic phenomenon. These are distinct traditions with their own complex theologies.

Ancestor Veneration (Pan-African)
African / Diaspora
The honoring of deceased family members as ongoing spiritual presences who influence the living. Ancestor spirits in African traditions are not threatening unless neglected, disrespected, or improperly mourned. Many reported hauntings in African and African diaspora households are understood by the clients through this framework — and that framework deserves respect in documentation.
Lwa / Loa
Haitian VodouDivine
Spiritual beings in Haitian and Louisiana Vodou tradition who serve as intermediaries between the divine and humanity. Lwa are not demons. They are complex spiritual beings with specific personalities, domains, and ritual relationships.
Major Lwa
Legba
Crossroads, communication, opening paths.
Baron Samedi
Death, resurrection, humor.
Erzulie Freda
Love, beauty, luxury.
Ogou
Iron, war, strength.
CE
Celtic Traditions
The Fair Folk / Aos Sí / Faery
Irish / Scottish / WelshNon-Human
The supernatural beings of Celtic tradition. Known by many names: the Tuatha Dé Danann in Irish tradition, the Tylwyth Teg in Wales, the Sídhe in Scottish tradition. These are not the miniature winged fairies of Victorian imagination — they are powerful, unpredictable entities associated with liminal spaces, ancient places, and natural forces. In older tradition, they are treated with extreme respect and caution.
Field Note

Clients in Ireland, Scotland, Wales, and communities with strong Celtic heritage may interpret unusual activity at old properties, near hillocks (fairy mounds), or beside ancient trees through this framework.

Banshee (Bean Sídhe)
Irish / Scottish
A female spirit in Irish and Scottish tradition whose wailing announces a death in specific family lineages. Not a generic ghost — the Banshee is associated with specific ancient Irish families and serves as a death herald rather than a haunting presence.
Black Dog
British IslesShadow Being
A large, spectral black dog appearing in folklore across Britain. Regional names include Black Shuck (East Anglia), Padfoot (Yorkshire), Barguest (North England), Gwyllgi (Wales). Associated with roads, crossroads, and death. Some accounts describe the black dog as protective; others as an omen.
See Also
Shadow Animal
Pooka / Púca
Irish / Welsh
A shapeshifting trickster entity in Irish and Welsh tradition capable of appearing as a horse, rabbit, goat, or human. Associated with twilight and wild places. Not malevolent but dangerous in its unpredictability.
The Wild Hunt
Germanic / Norse / Celtic
A spectral procession — riders, hounds, and sometimes the souls of the dead — crossing the sky or landscape, typically in winter. Appears in Germanic, Norse, and Celtic traditions. Associated with storms, death, and the passage of spirits.
NO
Norse & Germanic Traditions
Draugr
NorseUndead
A Norse undead being that retains the strength of the living and guards its grave. Associated with the jealous protection of burial goods. Relevant for archaeological or historically significant sites.
Nisse / Tomte
ScandinavianHousehold Spirit
A household spirit in Scandinavian tradition. Associated with the farm and its animals. Protective if treated well and properly offered; disruptive if ignored or disrespected. Relevant to rural property investigations in regions with Scandinavian heritage.
Vetter / Land Spirits
NorseNature Spirit
Spirits of specific places — fields, boulders, bodies of water, and hills. Deeply integrated into Norse religious practice. Relevant when investigating ancient or rural sites in regions with Norse heritage.
SL
Slavic Traditions
Domovoi (Домовой)
SlavicHousehold Spirit
A household spirit in Slavic tradition. The Domovoi lives behind the hearth or beneath the threshold and protects the home. Activity attributed to a Domovoi includes unexplained sounds, objects moved, and poltergeist-like phenomena — but within the tradition, a well-treated Domovoi is protective.
Field Note

Clients with Eastern European heritage may interpret household phenomena through this framework. Worth exploring in intake.

Rusalka (Русалка)
Slavic
A water spirit in Slavic tradition, often the ghost of a young woman who died by drowning or before marriage. Associated with lakes, rivers, and springs. Can be dangerous to those who enter their waters.
Kikimora (Кикимора)
SlavicHousehold Spirit
A female household spirit — unlike the Domovoi, the Kikimora is typically malevolent. Associated with bad dreams, illness in children, and domestic chaos.
Strigoi
RomanianUndead
A type of undead entity or troubled spirit in Romanian tradition, drawing on older Slavic roots. Associated with witchcraft, vampirism, and the returning dead. The strigoi viu is a living person with magical abilities; the strigoi mort is the undead form.
IA
Indigenous American Traditions
Indigenous American spiritual traditions are extraordinarily diverse — encompassing hundreds of distinct nations, languages, and worldviews. The following entries are presented with care and explicit recognition that many of these traditions are living, sacred, and not fully appropriate for public documentation. The following is offered in broad strokes for investigative context only.
Skinwalker (Diné / Navajo)
NavajoHandle With Respect
A figure in Navajo tradition — a person with the power to transform into and take on the abilities of animals. The Skinwalker is a practitioner of dark magic who has violated sacred taboos. The term has been widely exploited and sensationalized in media. Investigators should not use this term casually.
⚠ Important

In Navajo tradition, speaking of the Skinwalker in certain contexts is itself considered dangerous. If a client invokes this term, proceed with cultural sensitivity.

Wendigo (Algonquian Nations)
Algonquian
A spirit or entity associated with cold, famine, isolation, and the taboo of cannibalism. In Algonquian tradition, the Wendigo can possess a human being — producing Wendigo psychosis — or exist as a powerful predatory entity in its own right.
Trickster Figures
Pan-Indigenous American
Coyote, Raven, Crow, Spider, and other trickster figures appear across Indigenous American traditions as powerful beings associated with change, mischief, creation, and disruption. Clients may describe unusual, seemingly impossible, or absurd phenomena through a trickster framework.
EG
Egyptian & Near Eastern Traditions
Ka and Ba (Ancient Egyptian)
Ancient Egyptian
In ancient Egyptian belief, the human soul was divided into multiple parts. The Ka was the vital life force, associated with the double of the person. The Ba was the individual personality that could move between the world of the living and the dead after death.
Related Concepts
Akh
The transformed, glorified spirit of a properly prepared deceased person — the result of the Ka and Ba uniting. A successful Akh was an ancestor spirit that could benefit the living.
Mut (Dangerous Dead)
Those who did not undergo proper burial rites or who died violently. Feared as sources of illness and misfortune.
Lilith
Mesopotamian / Hebrew
A figure originating in Mesopotamian demonology (Lilitu — storm demon associated with disease and child death) and appearing in Hebrew tradition as a dangerous nocturnal entity. In later Kabbalistic tradition, identified as the first wife of Adam who became a demon. Associated with night, wind, and erotic dreams.
LA
Latin American & Mesoamerican Traditions
La Llorona
Latin AmericanGhost
One of the most widely known figures in Latin American folklore — the Weeping Woman. A spirit associated with waterways who weeps for her lost children. Regional variations exist across Mexico, Central America, and the American Southwest. Associated with the drowning deaths of children and with warnings to children not to go near water at night.
Santa Muerte
Mexican / Mexican-American
A folk saint venerated in Mexico and in Mexican-American communities — the personification of death. Santa Muerte is not a demon or evil entity. She is a folk religious figure associated with protection, healing, safe passage, and acceptance of death. Shrines and iconography may be found in the homes of clients and should not be misinterpreted as demonic paraphernalia.
Nahual
Mesoamerican
A human who can transform into an animal form — a shapeshifter in Mesoamerican tradition with pre-Columbian roots. In some traditions, every person has an animal spirit double (the tonal); a nahual is someone who can consciously access and take that form.
ME
Middle Eastern & Jewish Traditions
Dybbuk
Jewish / KabbalisticGhost
A spirit in Kabbalistic and Eastern European Jewish tradition — the soul of a dead person that attaches itself to a living person or a specific object. The dybbuk is typically the soul of someone who died with unresolved moral issues. It must be exorcised through religious ritual.
Ibbur
Jewish / KabbalisticGhost
Unlike the dybbuk, the ibbur is a benevolent spirit that attaches to a person for a specific purpose — to fulfill a commandment, to protect someone they loved, or to complete an important task before passing on.
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III
Volume Three
Equipment & Environmental Encyclopedia
Sections 9–14 · EMF, audio, visual, sensors, devices, causes & explanations
Section 9
EMF Equipment
Understanding Electromagnetic Fields
EMF Theory
Electromagnetic fields are produced wherever electricity flows. Every energized wire, every running appliance, every device that uses power generates an EMF. The field drops off rapidly with distance — doubling your distance from a source typically reduces the field to one-quarter of its previous strength. This rapid falloff means that knowing the position of every electrical source during baseline is essential. EMF meters measure field strength in milligauss (mG) or microtesla (µT). Conversion: 1 mG = 0.1 µT.
Reference Ranges
0.0 – 0.5 mG
Background. Normal in open spaces away from electrical infrastructure.
0.5 – 2.0 mG
Low environmental field. Expected near residential wiring.
2.0 – 10.0 mG
Elevated. Traceable to a nearby source in most cases.
10.0 – 50.0 mG
High. Almost certainly from significant electrical infrastructure.
50.0+ mG
Very high. Directly adjacent to panels, industrial equipment, or faulty wiring. Prolonged exposure not recommended.
Single-Axis EMF Meter
EMF Equipment
Measures field strength in one direction only. Must be rotated slowly through all three axes to get a full reading at any point. Less thorough than triaxial but useful for identifying source direction.
Triaxial EMF Meter
EMF EquipmentPreferred
Measures X, Y, and Z axes simultaneously — equivalent to three single-axis meters. Provides a true total field reading regardless of orientation. The preferred meter for baseline sweeps.
K-II / K2 Meter
EMF EquipmentInterference Risk
A widely used investigation meter featuring LED lights as a visual display. Responds to a specific frequency range (50–20,000 Hz). Popular for communication-style sessions because of its visual output.
⚠ Important

The K-II responds to RF interference from cell phones, radios, and other wireless devices — false triggers from device notifications are extremely common. Turn all wireless devices to airplane mode before using a K-II for response sessions.

Mel Meter
EMF + Temperature
A combination EMF and temperature device with a digital display. Some models include a red backlit display (designed for low-light visibility), an SDD (shadow detection device) option, and data logging. The MEL-8704 is one of the most commonly referenced models in investigation.
Trifield TF2
EMF EquipmentProfessional Grade
A professional-grade triaxial meter widely used in both scientific research and paranormal investigation. Offers three measurement modes: magnetic field (for paranormal use), electric field (for environmental EMF measurement), and radio/microwave (for RF detection). Considered among the most accurate field meters available to civilian investigators.
REM Pod
Proximity Device
A device with a short antenna that generates a weak electromagnetic field around itself. When a conductive material — including a human body — enters that field, the device alerts through lights and audio. Used as a proximity alert device in unmonitored areas during investigation.
⚠ Caution

The REM Pod triggers on any conductive material. Investigators walking near it, metallic objects shifting, and electrical fields from other equipment can all cause false triggers. Establish clear trigger protocols.

Ghost Meter Pro / Gauss Master
EMF Equipment
Consumer-grade single-axis meters. Functional for baseline sweeps but less precise than professional instruments. Understand their limitations before relying on them.
Section 10
Audio Equipment & Theory
The Noise Floor
Audio Theory
The lowest level of background signal present in any recording environment. Everything above the noise floor is potentially meaningful; everything at or below it is obscured by background interference. Understanding your noise floor is the first step in EVP analysis. Every recording device has an internal noise floor — the level of self-generated noise produced by its own circuitry. A high-quality recorder has a lower internal noise floor and can capture quieter signals without them being buried.
Frequency Response
Audio Theory
The range of frequencies a microphone or recorder can accurately capture, typically expressed in Hz. Human hearing covers approximately 20 Hz to 20,000 Hz. Understanding a device's frequency response matters when evaluating whether a captured sound is within the range the device reliably records.
Dynamic Range
Audio Theory
The difference between the quietest and loudest signals a recorder can faithfully capture. A wider dynamic range means the recorder handles both whispers and loud sounds accurately.
Clipping / Saturation
Audio Artifact
When a sound is too loud for a recorder's input sensitivity, the waveform is cut off at its peaks — producing a harsh, distorted artifact. Clipping is a common source of audio anomalies that new investigators misread as meaningful. It sounds like a buzzing, crackling, or grinding attached to loud sounds.
Compression Artifacts
Audio Artifact
Audio compression — used in MP3 and other lossy formats — removes data from recordings to reduce file size. At high compression rates, this can introduce audible artifacts including ghost echoes, warbling, and patterns that do not exist in the original recording.
Protocol

Always record in uncompressed or lossless formats (WAV, FLAC) for EVP work.

Microphone Bleed / Crosstalk
Audio Artifact
When sound from one channel or source leaks into another. On multi-microphone setups, sound picked up by one microphone is sometimes faintly detectable in another channel. This can produce doubled, echoed, or seemingly impossible audio positions during review.
Phantom Power
Audio Theory
A voltage supplied by a recorder to a condenser microphone, necessary for its operation. Phantom power issues can produce hum, pop, or static artifacts that may be misread as audio anomalies.
Directional vs. Omnidirectional Microphones
Audio Theory
An omnidirectional microphone captures sound equally from all directions — useful for ambient room recording. A cardioid or directional microphone captures sound primarily from in front and rejects sound from behind — useful for targeted capture and source isolation. Consumer recorders with internal microphones also pick up handling noise from being held or moved.
Audio Pareidolia
Psych. FactorCritical Concept
The neurological tendency to perceive meaningful patterns — specifically speech and language — in random noise. The brain's language processing systems are so powerful that they generate words and phrases from white noise, random sounds, and ambiguous audio when primed to expect them. The blind review methodology directly counters audio pareidolia: a reviewer who does not know what an EVP is supposed to say cannot be primed to hear a specific phrase. If multiple independent reviewers agree on the same content without prompting, the capture gains significance.
See Also
PareidoliaEVP Classification Standard
Section 11
Visual & Optical Equipment
Full-Spectrum Camera
Visual Equipment
A camera whose sensor has been modified (or is manufactured) to capture infrared (IR) and ultraviolet (UV) wavelengths in addition to visible light. Standard cameras have filters that block IR and UV. Removing or replacing those filters allows full-spectrum capture.
Infrared (IR) Illuminator
Visual Equipment
A device that emits infrared light invisible to the human eye but detectable by modified cameras. Used to illuminate investigation spaces in total darkness without visible light. Understanding the illuminator's range, angle, and power is critical for interpreting captures — bright spots, lens flares, and proximity artifacts are all common with IR illuminators.
Thermal / FLIR Camera
Visual Equipment
A camera that detects and visualizes heat radiation rather than visible or infrared light. Every object radiates heat based on its temperature. Thermal cameras display heat as a false-color gradient. Used for identifying cold spots, hot spots, heat-distributing equipment, and human presence in low-light conditions.
⚠ Caution

Thermal imaging is environmental mapping, not entity detection. Human investigators, electronics, HVAC output, and materials with varying emissivity all produce distinctive thermal signatures. Understand what thermal imaging is actually showing before interpreting it.

SLS Camera (Structured Light Sensor)
Visual EquipmentOften Misrepresented
A depth-sensing camera that emits a grid of IR dots to map the three-dimensional geometry of a space. Its software identifies human-shaped point clusters within that geometry and maps a stick-figure overlay onto them.
⚠ Caution

The SLS camera is one of the most misrepresented investigation tools in current use. A figure appearing on an SLS camera is not evidence of an entity — it is evidence that the algorithm found a point cluster matching its human-figure parameters. The algorithm will map figures onto doorframes, furniture, investigators partially out of frame, and irregular background surfaces. Corroborating captures from other instruments are essential before any SLS image is considered meaningful.

Photograph Integrity Checklist
TPI Protocol
Before presenting any photographic capture as evidence, every item on this checklist must be addressed.
Required Verification
  • What was the shutter speed? Motion blur is common in low-light photography.
  • Was the flash active? Backscatter creates orbs.
  • Where were all light sources, reflective surfaces, and team members?
  • Could the anomaly be lens flare, chromatic aberration, or sensor artifact?
  • Was the lens clean?
  • Is there a second photograph from a different angle at the same moment?
Section 12
Environmental Sensors & Monitoring
Temperature Measurement
Sensor
Three primary methods used in paranormal investigation.
Methods
IR Thermometer (Non-Contact)
Measures surface temperature by detecting IR radiation. Useful for scanning large areas quickly. Does not measure air temperature.
Ambient Temperature Probe
Measures actual air temperature at the probe's location. More accurate for documenting room-temperature anomalies.
Mel Meter (Combined)
Dual EMF and ambient temperature in a single device.
Humidity Sensor / Hygrometer
Sensor
Measures relative humidity. Critical for interpreting temperature anomalies (damp air behaves differently from dry air), visible vapor reports, and audio recordings (humidity affects acoustic properties of a space).
Barometric Pressure Sensor
Sensor
Measures atmospheric pressure. Pressure changes correlate with weather patterns and may be relevant to reports of pressure sensations or hearing changes. Infrasound levels can also vary with atmospheric pressure.
Air Quality Monitor
SensorSafety Critical
Measures airborne particles, carbon dioxide (CO₂), carbon monoxide (CO), volatile organic compounds (VOCs), and other environmental factors.
Protocol

Carbon monoxide monitoring should be considered mandatory for investigations in any older or poorly ventilated structure. See Carbon Monoxide entry for evacuation protocols.

See Also
Carbon Monoxide
Motion Sensor / PIR Detector
Sensor
A passive infrared motion detector that responds to changes in infrared radiation within its field of view — most commonly, body heat moving through the space. Useful for alerting investigators to movement in unmonitored areas.
Field Note

PIR sensors can be triggered by HVAC air movement warming or cooling objects in their field, by animals, and by equipment.

Geiger Counter / Radiation Detector
Sensor
Measures ionizing radiation. Rarely relevant to paranormal investigation but occasionally useful for historical properties where radiation sources — radium paint, medical equipment, industrial materials — may be present and producing unusual physical symptoms.
Section 13
Communication & Response Devices
Spirit Box / Sweep Radio
Communication DeviceEvidential Limitations
A device that rapidly sweeps AM or FM frequencies in continuous or reverse sequence, producing fragmented audio. Some investigators attempt to use the resulting fragments as a communication medium.
⚠ Scientific Assessment

The spirit box produces a continuous stream of random audio fragments. The brain's language processing system finds words and phrases in this stream — especially when primed with specific questions. There is no reproducible, controlled evidence that spirit box output is anything other than audio pareidolia applied to radio sweep artifacts.

TPI Policy

Spirit box sessions should be documented as experiential data at best. Results should not be elevated to evidence status without extraordinary corroboration.

Ovilus / Phasma Box
Communication DeviceEvidential Limitations
A device with an internal word bank that generates vocabulary based on changes in the electromagnetic environment. The premise is that an entity manipulates the local EMF to trigger specific words.
Field Note

The words generated by any Ovilus-type device are selected from a finite preset dictionary. Apparent relevance is subject to confirmation bias — the investigator finds meaning in words that match their expectations.

Pendulum
Communication DeviceIdeomotor
A weighted object suspended on a thread or chain used to receive yes/no responses through directional movement. Results are almost entirely attributable to the ideomotor effect — unconscious muscular movement in the holder's hand, driven by expectation or suggestion. Not a reliable investigative tool.
⚠ Caution

The ideomotor effect is well-documented and powerful. People are genuinely unaware of producing the movements. Results should not be documented as evidence.

See Also
Ideomotor Effect
Dowsing Rods
Communication DeviceIdeomotor
Two L-shaped rods held loosely in each hand that pivot in response to movement. Subject to the same ideomotor critique as the pendulum. The investigative value of dowsing rods is in their usefulness as a client interaction and ritual engagement tool — not as a detection instrument.
See Also
Ideomotor Effect
Section 14
Environmental Causes & Explanations
BLDG
Structural & Building Factors
Thermal Expansion and Contraction
Env. Cause
All building materials expand when warm and contract when cool. As temperatures drop at night — particularly after a heating system cycles down — the resulting material movement produces knocking, ticking, popping, and creaking sounds throughout a structure. These sounds can be irregular, hard to locate, and deeply convincing. In older structures with mixed materials, the sounds can be extensive.
Water Hammer
Env. Cause
An impact sound in plumbing systems produced when a valve closes rapidly and the momentum of moving water produces a shock wave. Sounds like a hard knock or bang, often with no apparent source.
Pipe Expansion
Env. Cause
Hot water or steam pipes expanding and contracting produce ticking, knocking, and squeaking sounds within walls. Can be highly directional and regular enough to seem responsive.
Building Settlement
Env. Cause
Older structures continue settling on their foundations over decades. This produces irregular, unpredictable sounds — creaks, pops, and sudden thumps — that can seem to follow investigators or respond to activity.
HVAC System Noise
Env. Cause
Heating and cooling systems produce fan noise, duct resonance, air movement, and temperature effects throughout a building. Ducts can transmit sound between rooms in ways that make it difficult to locate the source. HVAC cycling can also produce EMF fluctuations near the equipment.
Infrasound (HVAC-Generated)
Env. CausePsychoactive
Large HVAC systems, industrial fans, and heavy machinery can produce sound waves below 20 Hz. These waves pass through building materials and the human body without being heard but can produce physical and psychological effects: feelings of unease, dread, a sense of presence, visual disturbances (the eyeball resonates at approximately 18 Hz, producing visual artifacts), and even hallucinations in extreme cases. First systematically documented by Vic Tandy in 1998 in a "haunted" laboratory — the source was a standing wave produced by an extractor fan.
See Also
A-8 InfrasoundX-1 Sensed PresenceX-2 Oppressive Atmosphere
Faulty or Aging Wiring
Env. Cause
Old wiring produces inconsistent EMF fields, electrical arcing sounds, flickering lights, and device interference. Aluminum wiring (common in mid-20th century American construction) is particularly prone to creating unusual EMF patterns as it ages.
See Also
E-3 EMF AnomalyE-4 Electrical Disturbance
ENV
Environmental Factors
Carbon Monoxide
Env. CauseSafety Critical
Colorless, odorless gas produced by incomplete combustion. Low-level CO exposure produces headaches, dizziness, nausea, confusion, visual disturbances, and — importantly — a sense of presence or being watched, anxiety, and irrational fear. These effects are directly parallel to common haunting experiences. Faulty gas appliances, blocked flues, and attached garages are common CO sources.
⚠ Safety Protocol

CO monitoring is mandatory for any investigation in a structure with gas appliances, fuel-burning heating, or attached garage. If CO is detected at or above 70 ppm, evacuate the property immediately and call emergency services.

See Also
X-4 Physical SymptomsAir Quality Monitor
Mold Exposure
Env. Cause
Certain mold species produce mycotoxins that cause neurological symptoms in poorly ventilated or water-damaged spaces — including memory problems, confusion, and in some documented cases, hallucinations. Musty odors and visible water damage are indicators.
Radon
Env. Cause
A naturally occurring radioactive gas that accumulates in basements and lower floors of buildings over uranium-bearing soil. Produces no immediate perceptible symptoms but is a significant long-term health risk. Relevant when investigating older structures in high-radon geology.
Temperature Inversion
Env. Cause
A weather condition in which a layer of warmer air sits above cooler air, trapping cold air near the ground. Can produce unusual acoustic effects — sounds carrying farther and in unexpected directions.
PSY
Human Physiological & Psychological Factors
Sleep Deprivation
Psych. Factor
Investigations typically run late into the night. Investigators and clients deprived of sleep experience reduced critical thinking, heightened emotional sensitivity, auditory and visual hallucinations, and impaired memory. All evidence reviewed by sleep-deprived investigators should be re-reviewed after adequate rest.
Hypervigilance
Psych. Factor
In an environment primed as potentially haunted, investigators and clients enter a state of heightened sensory attention. Hypervigilance increases the detection of ambiguous stimuli and significantly increases the tendency to interpret ambiguous stimuli as meaningful.
Confirmation Bias
Psych. Factor
The tendency to notice, remember, and give weight to information that confirms existing beliefs. In investigation, it produces selective documentation — interesting anomalies are written up extensively; mundane explanations are glossed over.
Pareidolia
Psych. FactorCritical Concept
The brain's tendency to find recognizable patterns — faces, figures, voices, words — in random or ambiguous stimuli. The brain evolved to find faces and detect human speech, so it over-applies these processes to non-human stimuli. Visual pareidolia produces faces in wood grain, clouds, and shadows. Audio pareidolia produces speech in static, water, and wind.
See Also
Audio PareidoliaConfirmation Bias
Ideomotor Effect
Psych. Factor
Unconscious muscular movements driven by expectation or suggestion. Responsible for the movement of pendulums, dowsing rods, planchettes on Ouija boards, and other "response" phenomena. The movements are real and the person producing them is genuinely unaware of doing so.
See Also
PendulumDowsing Rods
Suggestion and Social Contagion
Psych. Factor
One witness's vivid description of an experience significantly shapes subsequent reports from other witnesses in the same location. Investigators should not share findings or interpretations with witnesses before taking independent statements.
Grief Response
Psych. Factor
Bereaved individuals frequently report experiences of presence, communication, and sensory contact with the deceased — particularly in the weeks and months following a death. These experiences are widely reported, often deeply meaningful to the bereaved, and most parsimoniously explained by grief neuropsychology rather than paranormal activity.
Temporal Lobe Sensitivity
Psych. Factor
Research by Michael Persinger and others has documented that magnetic field stimulation of the temporal lobes can produce experiences of presence, profound spiritual feelings, and sensory phenomena. Some researchers theorize that environments with unusual EMF profiles may produce these effects in susceptible individuals.
See Also
E-3 EMF AnomalyX-1 Sensed Presence
EQP
Equipment & Recording Artifacts
Dust / Moisture Orbs
Visual Artifact
The overwhelming majority of orb captures are airborne particles — dust, pollen, skin cells, water droplets, or insects — caught in close proximity to a camera's flash or IR illuminator and thrown out of focus. The resulting circular bokeh is a basic optical property of lens focus, not a paranormal phenomenon. Orbs should be treated as likely environmental artifacts unless an independent reason to classify them otherwise exists.
See Also
V-5 Light Anomaly
Lens Flare
Visual Artifact
Internal reflections between lens elements produce geometric patterns — circles, hexagons, streaks of light — in photographs and video, particularly when a bright light source is near or within the frame. IR illuminators are a common source.
Motion Blur
Visual Artifact
In low-light photography, long shutter speeds cause moving objects to appear as streaks or transparent forms. Investigators, their breath, insects, and floating debris can all produce alarming-looking motion blur at low shutter speeds.
Camera Strap and Hair Artifacts
Visual Artifact
A camera strap, hair, or debris hanging in front of the lens and caught by the IR illuminator produces the classic elongated vortex capture. Always check for obstructions before reviewing captures.
See Also
V-6 Vortex Anomaly
Recorder Handling Noise
Audio Artifact
The act of holding or setting down a recorder produces handling noise — friction, impact, and vibration sounds picked up by the microphone. Recordings from handheld devices always contain this artifact. Stationary placement on a soft surface (foam pad) reduces it significantly.
Radio Frequency Interference (RFI)
Audio Artifact
Cell phones, walkie-talkies, and wireless devices produce radio frequency bursts that some audio recorders pick up as clicking, buzzing, or voice-like patterns. Always note when wireless devices are in use near recording equipment.
See Also
K-II Meter
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IV
Volume Four
TPI Investigation Standards
Sections 15–18 · Evidence grading, EVP classification, documentation standard, language guide
Section 15
The TPI Evidence Grading System
Tier 1 — Multi-Source Corroborated
TPI StandardMaximum Weight
An event captured on two or more independent instruments simultaneously, or a captured event that corresponds to an independently documented simultaneous event at the same location. Example: an audio recording of an unidentified sound corresponding within 2 seconds to an EMF spike and a temperature drop in the same documented clean zone.
Weight

Maximum. Should be the centerpiece of any evidence presentation.

Tier 2 — Single-Source Capture in Clean Zone
TPI StandardSignificant
An event captured on one instrument that cannot be explained by known environmental conditions, equipment behavior, or investigator activity, occurring in a location documented as a clean zone during baseline.
Weight

Significant. Context from baseline documentation and investigator logs is essential.

Tier 3 — Single-Source Capture with Explanatory Gap
TPI Standard
A captured event for which no explanation has been confirmed, but baseline documentation for the location is incomplete or the capture occurred in proximity to a known source.
Weight

Moderate. Should be noted and preserved but not presented as primary evidence.

Tier 4 — Witness-Corroborated Experience
TPI Standard
A personal experience simultaneously reported by two or more independent witnesses without prior communication between them.
Weight

Moderate-Low. Documents an experience. Not equipment-based.

Tier 5 — Single Witness Experience with Environmental Support
TPI Standard
A personal experience occurring in conditions that were independently anomalous at the same time — a clean zone EMF spike, a confirmed temperature anomaly.
Weight

Low. Documents a possible correlation.

Tier 6 — Single Witness Experience Only
TPI Standard
A personal experience without environmental support, equipment corroboration, or secondary witness.
Weight

Minimal. Documents that the experience was reported. No investigative conclusion can be drawn.

Section 16
The TPI EVP Classification Standard
The following is the official EVP classification standard of The Paranormal Initiative. All team members should apply these criteria consistently.
Class A EVP
TPI StandardHighest Grade
Clear and distinct vocalization or sound meeting all of the following criteria:
Required Criteria
  • Clear and distinct vocalization or sound
  • Intelligible content broadly agreed upon by a minimum of three independent reviewers
  • None of the reviewers were told what the capture is supposed to contain before their review
  • No known explanation from environmental, investigator, or equipment sources
  • Waveform analysis confirms the capture is not a recording artifact
Class B EVP
TPI Standard
Partially intelligible vocalization or sound.
Criteria
  • Some reviewers agree on content without prior suggestion; others cannot confirm
  • No immediately obvious environmental explanation
  • Worth preserving and documenting; not suitable as standalone evidence
Class C EVP
TPI StandardDo Not Present
Ambiguous. Content agreement only reached after prompting or suggestion.
Policy
  • Should be treated as audio pareidolia until exceptional evidence exists otherwise
  • Should not be presented to clients as evidence
  • Archive with notes; do not publish or share publicly
Declassified / Artifact
TPI Standard
An explanation has been confirmed — investigator sound, equipment artifact, building sound, or radio interference.
Action
  • Remove from evidence record with documentation of the explanation
Section 17
The TPI Documentation Standard
Rule 1 — Observe, Don't Conclude
Documentation Rule
Write what was observed or measured. Do not write conclusions unless a thorough analysis supports them and they are clearly labeled as interpretive conclusions.
Examples
✓ Write
"A temperature drop of 3.8°F was measured at the east doorway beginning at 11:47 PM and lasting approximately 90 seconds. The HVAC system was off. No open windows or doors were identified in the vicinity."
✗ Do Not Write
"A ghost caused the temperature to drop in the east doorway."
Rule 2 — Precise Language Only
Documentation Rule
Avoid dramatic, vague, or emotionally loaded language in formal documentation.
Examples
✓ Write
"Investigator reported hearing a single impact sound from the direction of the north wall at 12:03 AM."
✗ Do Not Write
"A terrifying bang from the haunted wall."
Rule 3 — The Restricted Word List
Documentation RuleStrict
The following words should not appear in formal case documentation unless they are quoted directly from a client or witness statement (in which case, attribute them explicitly):
Restricted Words

Haunted, ghost, spirit, demon, entity, evil, possessed, supernatural, paranormal (in a conclusory sense), poltergeist (unless classification criteria are met), intelligent (unless the definition is met), residual (unless the definition is met). These are conclusion words. A case file earns the right to use them only after the evidence supports the definition.

Rule 4 — Time Stamps Are Mandatory
Documentation Rule
Every reported event, equipment reading, and investigator action in a case file must carry a timestamp. A floating claim without a time cannot be corroborated.
Rule 5 — Attribute All Statements
Documentation Rule
"Investigator observed" — which investigator? "Sound was heard" — by whom? All reports must identify the person making the report.
Rule 6 — Negative Findings Are Findings
Documentation Rule
A thorough investigation that finds explanations for all reported phenomena is a successful investigation. Document the explanations completely and present them to the client with the same care as positive evidence.
Case File Required Elements
TPI Protocol
Every TPI case file must contain the following elements at each phase.
Pre-Investigation
Required Documents
Signed client intake form · Signed property access and permission form · Signed evidence release form · Liability documentation · Client interview transcript or notes · Historical research documentation · Initial floor plan with client-identified hotspots
Baseline
Required Documents
EMF baseline report (Phase 1 and Phase 2) · Environmental baseline (temperature, humidity, pressure) · Audio baseline recording · Photographic baseline survey · Floor plan annotated with all known EMF sources and clean zones
Investigation
Required Documents
Timestamped investigation log · All raw audio and video media · All raw EMF, temperature, and environmental sensor logs · Investigator notes from each session · Floor plan annotated with all captures and events
Review & Final Report
Required Documents
Chain of custody for all media · Blind review records · Evidence classification for each capture · Explanation documentation for all identified artifacts · Summary of reported phenomena · Explained findings · Unexplained findings with tier classification · Recommendations for follow-up
Section 18
The TPI Language Guide
Using consistent language across all team members, all documentation, and all client communication is a mark of professionalism. The following is the official vocabulary of The Paranormal Initiative.
Preferred Terms
TPI Standard
Replace imprecise or conclusory language with these preferred terms in all official documentation and client communication.
Term Substitutions
Instead of: Ghost / Spirit
Use: Presence (unclassified) · Apparent entity (documented) · Residual impression (when residual criteria are met)
Instead of: Haunted
Use: "The location has documented unexplained activity" or "the case file reflects persistent reports"
Instead of: We caught a ghost on camera
Use: "We captured an anomalous visual event that has not been explained by known environmental or equipment factors"
Instead of: The demon made the lights flicker
Use: "Electrical disturbance was documented at [time] in [location]. No wiring cause was identified during baseline."
Instead of: Paranormal evidence
Use: Unexplained evidence or "evidence that has not been explained to date"
Instead of: Proof
Use: Documentation · Supporting evidence · Unexplained phenomenon (proof is a legal and scientific standard rarely met in investigation)
Instead of: It followed her home
Use: "The witness reports continued activity at a second location following [date]"
Client Communication Standards
TPI Standard
When presenting findings to clients, use language that is honest about what can and cannot be concluded, does not amplify fear unnecessarily, distinguishes between what was documented and what is theorized, and acknowledges the client's experience as real, regardless of its explanation.
Field Note

A client who is frightened deserves clear, honest communication — not dramatic confirmation or dismissive denial. Our role is to investigate, document, and inform — not to perform.

This encyclopedia represents the working standard of The Paranormal Initiative. It is a living document — it will expand as the field develops, as new evidence standards emerge, and as the team's experience deepens.

Every section was written with a single guiding principle: the best paranormal investigator is the one who works hardest to explain everything away. When something remains standing after that effort — after the structural analysis, the environmental mapping, the equipment audit, the psychological review, and the blind evidence evaluation — that is when it deserves to be called unexplained.

That standard is what gives the work meaning. And that standard is what this encyclopedia exists to support.

The Paranormal Initiative · Official Field Encyclopedia · Investigation Development Series
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The Paranormal Initiative
Official Field Encyclopedia · Complete Edition · 4 Volumes · 18 Sections