Noise level heard inside a bus in busy city traffic or inside a sub-way train corresponds to about ______________ decibels?
Correct answer: B. 95
- A. 75
- B. 95
- C. 120
- D. 140
Explanation
Busy buses and subway trains commonly produce noise near 95 dB, a level high enough for prolonged exposure to threaten hearing. About 120 dB approaches the pain threshold, while 140 dB is associated with severe impulse noise.
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