What is the permissible noise level duration when exposed to a 100 dBA sound level?

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Multiple Choice

What is the permissible noise level duration when exposed to a 100 dBA sound level?

Explanation:
At 100 dBA, the permissible exposure time is determined by the exchange rate used with OSHA’s noise standard. The baseline is 90 dBA for 8 hours, and for every 5 dB increase above 90, the allowable time halves. So 95 dBA allows 4 hours, 100 dBA allows 2 hours, and 105 dBA allows 1 hour. The quick calculation is T = 8 × 2^((90 − L)/5); for L = 100, T = 8 × 2^(-2) = 2 hours. Therefore, the correct answer is 2 hours.

At 100 dBA, the permissible exposure time is determined by the exchange rate used with OSHA’s noise standard. The baseline is 90 dBA for 8 hours, and for every 5 dB increase above 90, the allowable time halves. So 95 dBA allows 4 hours, 100 dBA allows 2 hours, and 105 dBA allows 1 hour. The quick calculation is T = 8 × 2^((90 − L)/5); for L = 100, T = 8 × 2^(-2) = 2 hours. Therefore, the correct answer is 2 hours.

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