Level of noise recommended in eight-hour work day:

A ) 80-90 dB

B ) 80-85 dB

C ) 80-90 dB ✅

D ) 90-95 dB

Related Questions
  1. The intensity of rustling of leaves is:
  2. Sound waves frequency lower than 20Hz are called:
  3. 1 bel =
  4. Ultrasound waves carry energy:
  5. The intensity level of whispering is:
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