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audio frequency
au·di·o fre·quen·cy (plural au·di·o fre·quen·cies)


noun 
Definition:
 
frequency heard by human ear: a frequency that is audible to the human ear, between 20 and 20,000 hertz in people with normal hearing
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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