Extremely high-power complete after-effects can agitate and/or abort the eardrums of a ambition and could could cause astringent affliction or disorientation. This is usually acceptable to incapacitate a person. Less able complete after-effects can could could cause bodies to acquaintance abhorrence or discomfort. The use of these frequencies to incapacitate bodies has occurred both in counter-terrorist and army ascendancy settings.
The achievability of a accessory that produces abundance that causes beating of the eyeballs — and accordingly baloney of eyes — was allegedly accepted by the plan of architect Vic Tandy34 while attempting to deflate a “haunting” in his class in Coventry. This “spook” was characterised by a activity of anxiety and ambiguous glimpses of a blah apparition. Some detective plan active a anew installed extractor fan that, Tandy found, was breeding infrasound of 18.9 Hz, 0.3 Hz, and 9 Hz.
In 2005 BBC appear that the aggregation of the cruise address Seabourn Spirit acclimated a continued ambit acoustic accessory (LRAD) to avert pirates who chased and attacked the ship.5 More frequently this accessory and others of agnate architecture accept been acclimated to banish protesters and rioters in army ascendancy efforts. A agnate arrangement is alleged a "magnetic acoustic device".6
The BBC appear in Oct 2006 on a 'mobile' sonic accessory which is getting acclimated in Grimsby, Hull and Lancashire and is advised to avert teenagers from abiding about shops in ambition areas. The accessory works by abounding an ultra-high abundance bang (around 19–20 kHz) that teenagers or humans beneath about 20 are affected to and acquisition uncomfortable. Age-related audition accident allegedly prevents the ultra-high angle complete from causing a nuisance to those in their backward twenties and above, admitting this is wholly abased on a adolescent person's acknowledgment to top complete burden levels.
High-amplitude complete of a specific arrangement at a abundance abutting to the acuteness aiguille of animal audition (2-3 kHz) is acclimated as a burglar deterrent.7
During the 2009 G20 acme in Pittsburgh, the badge acclimated complete cannons adjoin protestors.8
The achievability of a accessory that produces abundance that causes beating of the eyeballs — and accordingly baloney of eyes — was allegedly accepted by the plan of architect Vic Tandy34 while attempting to deflate a “haunting” in his class in Coventry. This “spook” was characterised by a activity of anxiety and ambiguous glimpses of a blah apparition. Some detective plan active a anew installed extractor fan that, Tandy found, was breeding infrasound of 18.9 Hz, 0.3 Hz, and 9 Hz.
In 2005 BBC appear that the aggregation of the cruise address Seabourn Spirit acclimated a continued ambit acoustic accessory (LRAD) to avert pirates who chased and attacked the ship.5 More frequently this accessory and others of agnate architecture accept been acclimated to banish protesters and rioters in army ascendancy efforts. A agnate arrangement is alleged a "magnetic acoustic device".6
The BBC appear in Oct 2006 on a 'mobile' sonic accessory which is getting acclimated in Grimsby, Hull and Lancashire and is advised to avert teenagers from abiding about shops in ambition areas. The accessory works by abounding an ultra-high abundance bang (around 19–20 kHz) that teenagers or humans beneath about 20 are affected to and acquisition uncomfortable. Age-related audition accident allegedly prevents the ultra-high angle complete from causing a nuisance to those in their backward twenties and above, admitting this is wholly abased on a adolescent person's acknowledgment to top complete burden levels.
High-amplitude complete of a specific arrangement at a abundance abutting to the acuteness aiguille of animal audition (2-3 kHz) is acclimated as a burglar deterrent.7
During the 2009 G20 acme in Pittsburgh, the badge acclimated complete cannons adjoin protestors.8
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