Science Fair Project Encyclopedia
Audio frequency
An audio frequency (abbreviation: AF) is any frequency from about 20 hertz to about 20 kilohertz, which is the approximate range of sound frequencies audible to humans. The variable whose frequency is being measured can be any physical property capable of oscillating in this frequency range, such as electric current, sound pressure in air, or mechanical vibration.
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details