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Sound vibrations with frequencies less than 20 Hz are called A) infrasonics. B)
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Sound vibrations with frequencies less than 20 Hz are called
A) infrasonics.
B) ultrasonics.
C) supersonics.
D) infrared.
E) megasonics.

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Sound vibrations with frequencies less than 20 Hz are called A) infrasonics. B)
Mar 22, 2012

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