NOISE CALCULATIONS

1) Question:


The Noise level measured at a distance of       meters from a noise source is  dBA. What will be the noise level if
measured at a distance of     meters from the same noise source?.

Answer : dBA.

2) Question:


In a noisy machine building / plant 'n' number of noisy machines are in operation. The table below indicates the noise level of individual machine. What will be the overall noise level if 'n' number of machines run at a time?.
Machine No.
Individual Machine Noise when it runs alone
1
(dBA)
2
(dBA)
3
(dBA)
4
(dBA)
5
(dBA)
6
(dBA)
7
(dBA)
8
(dBA)

The overall noise level when all the above
machines run at a time dBA



3) Sound Power Energy Calculation:

Calculate equivalent energy for the given Sound Power Level (SWL) in dB.

Sound Power Level
dB
Energy in Watts
Watts.
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