sound wave

noun Physics.
a longitudinal wave in an elastic medium, especially a wave producing an audible sensation.

1865–70 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
sound wave
a wave that propagates sound

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Example sentences
Reflections from undersea organisms, such as whales, can disrupt the sound
  wave's path.
The quantization of this sound wave leads to phonons.
The pressure at a fixed point swings from low to high and back as the sound
  wave sweeps by.
If there are no ears to hear the sound wave, it still exists.
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