sound pressure

noun Physics.
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.

1890–95 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To sound pressure
Example sentences
Since sound enters the cochlea at its base, the high-frequency hair cells get
  the brunt of the incoming sound pressure.
Sound is produced by the vibration of sound pressure waves in the air.
Sound pressure levels are used to measure the intensity of sound and are
  described in terms of decibels.
One-third octave band sound pressure levels will be presented.
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