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How Is Sound Measured?

April 26, 2017measured sound

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How Is Sound Measured?

3 Answers

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A sound level meter is the principal instrument for general noise measurement. The indication on a sound level meter (aside from weighting considerations) indicates the sound pressure, p, as a level referenced to 0.00002 Pa, calibrated on a decibel scale. Sound Pressure Level = 20 x lg (p/0.00002) dB Often, the “maximum” level and sometimes the “peak” level of the sound being measured is quoted. During any given time interval the peak level will be numerically greater than the maximum level and the maximum level will be numerically greater than the (rms) sound pressure level; peak>max>rms.

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Sound is measured in decibels (dB). A decibel describes the relative loudness of a sound.

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A sound level meter is the principal instrument for general noise measurement. The indication on a sound level meter (aside from weighting considerations) indicates the sound pressure, p, as a level referenced to 0.00002 Pa.