During normal conversation sound heard at 1 meter distance is -: (A) 80 dB, (B) 60 dB, (C) 90 dB, (D) 120 dB
Answer is B. Whisper - 30 dB
Normal conversation - 60 dB
Shout - 90 dB
Discomfort of the ear - 120 dB
Pain in the ear - 130 dB