What amount of noise may damage eardrums thus permanently impairing hearing ability?
A. 10 dB
B. 150 dB
C. 15 dB
D. 50 dB
Answer:B
What amount of noise may damage eardrums thus permanently impairing hearing ability?
A. 10 dB B. 150 dB C. 15 dB D. 50 dB