Write unit of intensity of sound.
GSEB - Class 9 Chapter - 2. Wave Motion and Sound Page 23
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Amplitude is the unit for intensity of sound
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The common unit of power is the watt ( 1w = 1 Joules/s). The unit of SL is called the decibel (abbreviated dB). I is the intensity of the sound expressed in watts per meter and Io is the reference intensity defined to be 10-12 w/m2.
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