Numerical: Sound power level, given power

Q.  What will be the sound power level, if a machine generates 20 W power?
- Published on 11 Sep 15

a. 124 dB
b. 133 dB
c. 150 dB
d. 200 dB

ANSWER: 133 dB

Post your comment / Share knowledge

Enter the code shown above:
(Note: If you cannot read the numbers in the above image, reload the page to generate a new one.)