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            What is the loudness of sound? What factors does it depend on?  

Answer:

                  Loudness of sound is a measure of response of sound to our ear. Loudness of sound is not simply the energy reaching the human ear, but it also tells about the sensitivity of human ear detecting this energy. Loudness of sound is measured in decibel (dB). As energy reaching the ear depends on square of amplitude, so loudness of sound depends on two factors: (i) Amplitude of sound waves and (ii) Sensitivity of ear