above how much db the sound becomes painful
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hey mate!!! The range of audible frequencies in humans is from 20hz to 20,000hz...
hope it helps
hope it helps
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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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