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What is the difference between Sound Power Level and Sound Pressure Level?

April 26, 2017difference Engineering level Mathematics power pressure sound

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What is the difference between Sound Power Level and Sound Pressure Level?

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Sound power is an absolute value of emitted acoustical energy emitted by the sound source. Sound pressure is an atmospheric pressure disturbance, with a variable intensity depending on source strength, distance to the receiver, and everything in between. It is what we hear, and meters measure.