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IEVref:801-22-07ID:
Language:enStatus: Standard
Term: sound pressure level
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Definition: logarithm of the ratio of a given sound pressure to the reference sound pressure. Sound pressure level in decibels is 20 times the logarithm to the base ten of the ratio

NOTE 1 – Unless otherwise specified, the reference sound pressure is 20 μPа for airborne sound and 1 μPa for sound in media other than air.

NOTE 2 – Unless otherwise specified, the sound pressures are understood to be expressed in root-mean-square values.


Publication date:1994-07
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