Sound waves propagate via air molecules colliding with their neighbors. When air molecules collide, they also bounce away from each other. This keeps the molecules from continuing to travel in the direction of the wave. Sound is a disturbance of the atmosphere that human beings can hear.
Our eardrums (timpanic membranes) are moved by the sound pressure or the sound pressure level (SPL) in pascals. That is a sound field quantity. Also the microphone diaphragms are moved by the sound pressure. That is why we measure the sound with am SPL meter; see:
"Sound pressure and Sound power – Effect and Cause":
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Sound waves propagate via air molecules colliding with their neighbors. When air molecules collide, they also bounce away from each other. This keeps the molecules from continuing to travel in the direction of the wave. Sound is a disturbance of the atmosphere that human beings can hear.
Our eardrums (timpanic membranes) are moved by the sound pressure or the sound pressure level (SPL) in pascals. That is a sound field quantity. Also the microphone diaphragms are moved by the sound pressure. That is why we measure the sound with am SPL meter; see:
"Sound pressure and Sound power – Effect and Cause":
http://www.sengpielaudio.com/SoundPressureAndSound...
Cheers ebs
PS: Better forget the sound intensity (W/m²). That is a sound energy quantity.