What will be the sound power level, if a machine generates 20 W power?
A. 124 dB
B. 133 dB
C. 150 dB
D. 200 dB
Answer:B
What will be the sound power level, if a machine generates 20 W power?
A. 124 dB B. 133 dB C. 150 dB D. 200 dB