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sound pressure

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noun Physics.
  1. Also called excess sound pressure, instantaneous sound pressure. the difference between the pressure at a point in a medium through which a sound wave is passing and the static pressure of the medium at that point.
  2. effective sound pressure.
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Origin of sound pressure

First recorded in 1890–95
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018