Definition of Sound pressure
In acoustics, sound pressure or acoustic pressure is the pressure difference between the ambient (average or equilibrium) atmospheric pressure and that of a sound wave. In air, sound pressure can be measured using a microphone, and in water with a hydrophone. The SI unit of sound pressure is the pascal (Pa).
Related terms
Bass amplifier
A bass amplifier (also abbreviated to bass amp) is a musical instrument electronic…
Infrasound
Infrasound, sometimes referred to as low frequency sound or (sometimes ambiguously)…
Sound level meter
A sound level meter (also called sound pressure level meter) is used for acoustic…
Quiet PC
A quiet, silent or fanless PC is a personal computer that makes very little or no noise…
The Mosquito
The Mosquito or Mosquito alarm is a machine used to deter loitering by emitting sound at…
Photoacoustic effect
The photoacoustic effect or optoacoustic effect is the formation of sound waves…
Acoustic radiation pressure
Acoustic radiation pressure is the apparent pressure difference between the average…
Acoustic approximation
In acoustics, the acoustic approximation is a fundamental principle that states that an…
Acoustic levitation
Acoustic levitation is a method for suspending matter in air against gravity using…
Questions people ask
Real questions from the Stack Exchange community – follow a link to read the discussion.
Frequently asked questions
What is Sound pressure?
In acoustics, sound pressure or acoustic pressure is the pressure difference between the ambient (average or equilibrium) atmospheric pressure and that of a sound wave. In air, sound pressure can be measured using a microphone, and in water with a hydrophone.