<prompt> During normal conversation sound heard at 1 meter distance is-80 dB60 dB90dB120 dB  <response>: 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 