<prompt> During normal conversation, sound heard at 1meter distance is60dB80dB90dB120dB  <response>: 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: Dhingra 7e pg 21. 