Question:medium

There are 16 similar machines located radially and equally distanced from a fixed sound receiver. While operating, each machine records 60 dB sound level at the receiver. Assuming 70 dB to be the highest sound level allowed as per the industrial sound pollution norms, the total number of machines allowed to operate simultaneously without violating the norms is _________. (rounded off to the nearest integer)

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When multiple sound sources are involved, the total sound level increases logarithmically. Use this property to calculate the number of sources allowed under a given noise limit.
Updated On: Nov 25, 2025


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