Multiple choice

What is the maximum limit of sound intensity in decibel units beyond which a person cannot hear?

  1. 50

  2. 70

  3. 85

  4. 95

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

85 dB is typically cited as the maximum safe exposure limit for occupational hearing safety (about 8 hours exposure). Beyond this level, prolonged exposure can cause permanent hearing damage. The pain threshold is much higher (~120 dB), but 85 dB is the safety cutoff.