define loudness and write its SI unit
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The loudness of sound is measured in units called decibels (dB). A decibel unit expresses the relative intensity of sounds on a scale from zero for the average least perceptible sound to about 100 dB, which is near the level most people find uncomfortably loud
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loudness of a body determines on its amplitude.
SI unit if loudness is decibles.
I hope it will help u
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