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Loudness N is measured in in sones.

Loudness Level NL is measured in phons.

Sound pressure level is measured in dBSPL, where the reference level of 0 dBSPL is the threshold of hearing.

The ear drums and the microphones are only sensitve to the sound pressure. We measure the sound pressure with a sound level meter.

Loudness is affected by sound pressure, frequency and its bandwidth, and duration (time).

Usually sound is measured in Decibels.

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The unit of measuring the intensity of sound is kept after the name of which eminent scientist?

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The unit of sound measurement used to quantify the intensity of sound waves is decibels (dB).


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