Research
Directional acoustics
Directed from distance into a small spot.People around the spot do not hear anything.
Pros and cons
Aiming the object takes a longer time.
The device can be used in a situation where the receiving person does not move, stays in one place.
Accompanied by an unpleasant feeling, sometimes even mild pain and palpitations.
Spatial acoustics
The targeted person can hear spatial sound around it's skull.In case of closure of the ear canal (PVU), the spatial acoustic effect changes into a spot sound source directly in the auditory organ and the spatial effect is lost.
Pros and cons
Limited performance, simple drowning out by higher intensity sound.
Clear acoustic technique
Clear sound directly audible. Or. Sound mixed with noise with an imaginary source from the location of a noisy environment.Pros and cons
Easy elimination with earplugs or silencers.
Power loss underwater.
In case of mixed sound with noise, after turning off the noise source, the acoustic effect itself get lost.
In the case of targeting a small area, if the recipient moves, the effect will be lost.
Resonance acoustics in organic materials
The acoustic effect can be heard by connection of the auditory organ (middle ear) with the jaw joint, e.g. by straining the auricular skeletal muscle.Otherwise, if making pressure on the jaw joint, the acoustic effect is lost. During walking, the intensity disappears (weakens) and returns (strengthens).
Pros and cons
The person hears an side effect in the form of noise, crickets or high-frequency whistling.
By straining the skeletal muscles of the neck, this phenomenon disappears.
Pulse phenomena
Audible strong clicking or snapping in ear or on plastic and metal surfaces.Pros and cons
Damage to unshielded electronic devices, can damage organs.