Solved Problems
Calculating combined noise levels from multiple sources
Problem 1: Decibel Addition
A factory floor has three machines operating simultaneously. Machine A generates 82 dB, Machine B generates 85 dB, and Machine C generates 78 dB. Calculate the total sound pressure level on the floor.
Example
Total Sound Pressure Level Calculation
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Noise Attenuation over Distance
Calculating sound level reduction due to spherical spreading
A construction site has a piece of heavy machinery that produces a Sound Pressure Level (SPL) of at a reference distance of . Assuming a point source and spherical spreading in a free field, calculate the SPL at a distance of .
Example
Calculate Attenuated Noise Level
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