from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A range of frequencies, usually from 15 hertz to 20,000 hertz, characteristic of signals audible to the normal human ear.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A frequency, or
rangeof frequencies of sound waves, that are audible
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun an audible acoustic wave frequency
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