Weighted sound pressure level

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A weighted sound pressure level is used in acoustic measurement technology in order to obtain a quantity that approximates the auditory perception of humans based on the sound pressure level as a physical quantity .

The weighted sound pressure level is neither a physiological nor a physical measured variable . Taking into account certain properties of the human hearing, it is based in an objectively defined and reproducible way on the physical quantity sound pressure level.

A distinction is made between frequency weighting curves and time weighting curves .

Evaluated level values ​​are identified by indices on the sign of the measured variable. Example: L pAF = 60 dB.

In practice, brackets are often used after the level measurement in dB ( decibel ), for example: L AF = 60 dB (A), L p C, peak = 135 dB (C).

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