Recommended average background noise level of Factories
A. 35 dB
B. 65 dB
C. 45 to 40 dB
D. 80 to 120 dB
Answer:C
Recommended average background noise level of Factories
A. 35 dB B. 65 dB C. 45 to 40 dB D. 80 to 120 dB