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.

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