Fluctuations in air pressure due to the presence of a sound. This sound pressure is expressed in units such as Pascals, microbars, or dynes/cm2.
the difference between the instantaneous pressure at a point in a sound field and the average pressure at that point
Root-mean-square instantaneous sound pressure at a point during a given time interval. Unit, Pascal (Pa) (ANSI S1.1-1994: sound pressure; effective sound pressure).
The sound pressure is the total instantaneous pressure at a point in space, in the presence of a sound wave, minus the static pressure at that point.
The instantaneous difference between the actual pressure and the average or barometric pressure of a given point in space, as produced by sound energy.
The range of air pressure fluctuations which occur due to the passage of sound waves. A doubling of sound pressure is equivalent to a 6 dB increase in volume or sound pressure level (SPL).
Sound pressure is the pressure deviation from the local ambient pressure caused by a sound wave. Sound pressure can be measured using a microphone in air and a hydrophone in water. The SI unit for sound pressure is the pascal (symbol: Pa).