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:
where:
- = local ambient atmospheric (air) pressure,
- = sound pressure deviation.
Read more about this topic: Sound Pressure
Famous quotes containing the words sound and/or pressure:
“We can say that the sound is the primary object of the act of hearing, and that the act of hearing itself is the secondary object.”
—Franz Clemens Brentano (1838–1917)
“The area [of toilet training] is one where a child really does possess the power to defy. Strong pressure leads to a powerful struggle. The issue then is not toilet training but who holds the reins—mother or child? And the child has most of the ammunition!”
—Dorothy Corkville Briggs (20th century)