Sound becomes physically painful above 80 dB - Environment & Biodiversity
Q. The level at which sound becomes physically painful is- Published on 31 Aug 15
a. Above 95 dB
b. Above 65 dB
c. Above 80 dB
d. Above 90 dB
ANSWER: Above 80 dB
Noise level is measured in terms of decibels (dB). A modifies scale called decibel – A (dbA) takes pitch into account. W.H.O. (World Health Organization) has prescribed optimum noise level as 45 dB by day and 35 dB by night. Anything above 80 dB is hazardous.