1) what is the formula for intensity of sound 2) do the example 11.23 in board 3) define intensity of sound  4) what is the unit of intensity of sound  5) what is known as inverse law of sound intensity 6) humans can detect the sound intensity level of  7) example of loudness of sound  8) define loudness of sound  9) what is the unit of decible 10) define Weber-Fechner's law

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