Infrapoltergeist
Infrapoltergeist activity is a modern parapsychological classification that describes the microscopic, sub-perceptual threshold of kinetic and acoustic paranormal disturbances. While a standard poltergeist is characterized by dramatic, macro-level events—such as furniture being thrown, doors slamming, or objects levitating—an infrapoltergeist operates just below the standard threshold of human sensory awareness. It is a haunting of millimeters and decibels.
Manifestations of an infrapoltergeist typically involve micro-movements of objects, sub-audible acoustic clicks and taps, localized thermal shifts of less than one degree, and faint vibrational tremors in structural materials. Occupants of an infrapoltergeist-active environment rarely witness objects flying; instead, they experience a pervasive sense of psychological unease, a feeling of the house “vibrating,” or the discovery that small items on desks or shelves have been rotated or shifted by a fraction of an inch overnight.

Because the human eye and ear are ill-equipped to detect these minor variances reliably, investigating this phenomenon requires the deployment of highly sensitive, laboratory-grade equipment. Field researchers utilize seismic accelerometer sensors to detect micro-tremors in floorboards, ultrasonic audio microphones for sub-audible clicking, and precision laser-deflection grids capable of registering the movement of an object by a single millimeter.
The debunking protocol for an infrapoltergeist is arguably the most rigorous in the field, as the mundane world is constantly in motion. Investigators must rule out the natural thermal expansion and contraction of timber structures as temperatures fluctuate, foundation settling, low-amplitude water hammer in plumbing lines, seismic activity from nearby heavy highway traffic, and even the resonant frequencies caused by large appliances cycling on and off in adjacent rooms.
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