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IEVref:415-06-02ID:
Language:enStatus: Standard
Term: weighted sound pressure level
Synonym1: sound level
[Preferred]
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Definition: logarithm of the ratio of a given sound pressure to the reference sound pressure of 20 ÁPa, the sound pressure being obtained with a standard frequency weighting and with a standard exponential time weighting.

NOTE 1 – Sound level in decibels is twenty times the logarithm to the base ten of that ratio.

NOTE 2 – Standard frequency weightings A and B used in IEC 61400-11 are given in IEC 60651 (1979): Sound level meters.


Publication date:1999-04
Source:801-22-14
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