Infrasonic Devices - aeonSolutions/AeonLabs-Safety-Health GitHub Wiki

INFRASONIC GENERATOR A modified version of the standard voice modulator, this model adds infrasonic tones as an underlayer to your normal voice. Infrasound hovers at a frequency just at the edge of human hearing, causing feelings of anxiety and fear. When activated, this modification adds its Rating to Intimidation Tests.

View on YouTube a brief, everyday, explanation of what it feels like "Fear Frequencies" type of at a distance attacks.

Certain frequencies of infrasound can produce that effect. These are below our range of hearing, generally below 20Hz, but can still be perceived. It can be felt as vibrations in the body, usually, the result is something along the lines of feeling your skin crawl or feeling like you're being watched (increases in anxiety, unease, and fear).

Infrasound due to issues with airflow (from hallways or rooms that result in standing waves, or HVAC equipment) are a common cause of people feeling like some particular place is "haunted". Since people find they have the same response when they are in a particular part of a building but they don't see any obvious reasons to feel that way so they reach for a word like "haunted" (either seriously or playfully).

At high intensity, various low-frequency sounds will resonate with your internal organs. You can be made to lose control of your bowels and bladder.

Several experiments have confirmed this relationship between infrasound and anxiety/fear, but there's still a lot of research that hasn't been done in the area yet.[1]

Symptoms of an ongoing, "wireless", at a distance, infrasonic aggression:

• reduced 3D perception of sound
• limited \ absent perception of low frequency sounds , for instance, bass and surround sounds

...due to the power and intensity of the aggression.

[1] https://www.reddit.com/r/askscience/comments/5ghy4m/is_it_true_that_there_are_certain_frequencies/