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audio frequency:see soundsound,
any disturbance that travels through an elastic medium such as air, ground, or water to be heard by the human ear. When a body vibrates, or moves back and forth (see vibration), the oscillation causes a periodic disturbance of the surrounding air or other medium that
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transmission or reception of electromagnetic radiation in the radio frequency range. The term is commonly applied also to the equipment used, especially to the radio receiver.
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audio frequency[¦ȯd·ē·ō ¦frē·kwən·sē]
A frequency that can be detected as a sound by the average young adult, approximately 15 to 20,000 hertz. Abbreviated af. Also known as sonic frequency; sound frequency.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
Any frequency of oscillation of a sound wave which is audible; usually in the range between 15 and 20,000 Hz (cycles per second).
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
Frequencies between 15 Hz and 25 kHz, which are audible to the human ear.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
a frequency in the range 20 hertz to 20 000 hertz. A sound wave of this frequency would be audible to the human ear
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005