1) Sound measurement
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https://www.crosswordclues.com/clue/sound-intensity
Sound intensity or acoustic intensity (I) is defined as the sound power Pac per unit area A. The usual context is the noise measurement of sound intensity in the air at a listener`s location as a sound energy quantity. where p (lower case) is the RMS sound pressure (acoustic pressure). == Sound intensity level == Sound intensity level or acoustic....
Found on
http://en.wikipedia.org/wiki/Sound_intensity
amount of energy flowing per unit time through a unit area that is perpendicular to the direction in which the sound waves are travelling. Sound ... [4 related articles]
Found on
http://www.britannica.com/eb/a-z/s/129
The quotient obtained when the average rate of energy flow in a specified direction and sense is divided by the area, perpendicular to that direction, through or toward which it flows. The intensity at a point is the limit of that quotient as the area that includes the point approaches zero.Sound intensity is a vector quantity. It describes as a fu...
Found on
https://www.encyclo.co.uk/local/20687
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