Sound intensity of whispering is:: (A) 30 dB, (B) 90 dB, (C) 2 dB, (D) 120 dB
Answer is A. The intensity of sound at 1 metre, in various human conversations are as below: Whisper - 30 dB Normal conversation - 60 dB Shout - 90 dB There occurs Discomfo in the ear at 120 dB and pain in the ear at a loudness of 130 dB