Sound Pressure - Instantaneous Sound Pressure

The instantaneous sound pressure is the deviation from the local ambient pressure caused by a sound wave at a given location and given instant in time.

The effective sound pressure is the root mean square of the instantaneous sound pressure over a given interval of time (or space).

Total pressure is given by:


p_{total} = p_{0} + p_{osc} \,

where:

= local ambient atmospheric (air) pressure,
= sound pressure deviation.

Read more about this topic:  Sound Pressure

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