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Also found in: Medical, Encyclopedia, Wikipedia, Hutchinson | 0.07 sec. |
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| The Invisio, designed for Special Forces and other covert units, does not suffer from boom or other microphone systems, in that by its being placed within the ear it does not pick up airborne sounds (helicopters, traffic, etc) and allows for a high-quality whisper function. The movement of non-impact or airborne sounds, such as speech, music and household noise, that travel through walls and ceilings is measured on a scale called the Sound Transmission Class (STC). The proportion of the insect world using airborne sounds is just the tip of the iceberg," he says. |
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