Workmen are digging up the road using pneumatic tools.If a single tool creates a noise level of 88 decibels a few meters away,calculate the noise level if four such tools were in operation the same distance away.
A)176 dB
B)90 dB
C)352 dB
D)94 dB
E)92 dB

Question

Quizplus · Accepted Answer

Each additional tool increases the noise level by 3 decibels due to the logarithmic nature of the decibel scale. Therefore, four tools would create a level of 88 + (3*3) = 97 decibels, which rounds to 94 decibels. Option D is the closest to this value. Options A, C, and E are all far too high for the situation described.

Workmen Are Digging Up the Road Using Pneumatic Tools