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What is During normal conversation sound heard at 1 meter distance is- and explain in detail?
Ans. is 'b' i.e., 60dB o Intensity is the strength of sound which determines its loudness. It is usually measured in decibels (dB).o Following are intensities when a person is at a distance of one meter from sound source. IntensityWhisper30 dBNormal conversation60 dBShout90 dBDiscomfort of ear120 dBPain in ear130dB