These systems are equipped with highly sensitive micro pressure sensors accurately measuring acoustic signals in a frequency range inaudible to the human ear.
He is a lean man, with an eaglet face and a sleepy-sounding voice, almost inaudible at a yard's range.
Outside the United States, the traffic information used by comparable systems is provided through cellphone links, inaudible signals in FM radio broadcasts or short-range transmitters along highways.
Whatever the intrinsic merits of the 20-minute score that each rock band composed for itself, the music sounded conventional to anyone used to 40 years of Cunningham sound, which has ranged from high-decibel to virtually inaudible.
Ultrasound utilizes sound waves in the range of greater than 20,000 Hz normally inaudible to human ears.
After this resting period, the participants were asked to indicate the mean tinnitus loudness during the resting period on a scale ranging from 0 to 10 (0 = tinnitus is inaudible, 10 = tinnitus is of usual loudness).
Lisnr uses the audio frequency range of ~18.7 kHz to 19.2 kHz for its communications, which is inaudible to 98percentt of people.
Kim then distorted the voices by playing them at a frequency below human hearing range; for a night, a Stockholm gallery space was filled with her inaudible song as its low frequencies rattled the gallery's windows and doors.
On the decibel scale, the range of human hearing extends from 0 dB, which represents a level that is all but inaudible, to about 130 dB, the level at which sound becomes painful.
