Loudness of sound is expressed in the units of
hertz
decible
frequency
wave
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Decibel (dB)
Decibel (dB), unit for expressing the ratio between two physical quantities, usually amounts of acoustic or electric power, or for measuring the relative loudness of sounds. One decibel (0.1 bel) equals 10 times the common logarithm of the power ratio.
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Answer:
decible i think so
Explanation:
if right mark as brainlist
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