<prompt> During normal conversation sound heard at a 1meter distance is60dB80dB90dB1200dB  <response>: Intensity: It is the strength of sound which determines its loudness. It is usually measured in decibels. At a distance of 1 m, intensity of Whisper 30 dB Normal conversation 60 dB Shout 90 dB Discomfo of the ear 120 dB Pain in the ear 130 dB Ref : Diseases of ENT by Dhingra 6th edition Pgno : 19 