Example crying babies

Two crying babies will produce double the intensity of sound of one baby, but will they be 'twice as loud'? How about three babies?

2 babies L2 = 10 log I2 = 10 log 2I1 = 10 log I1 + 10 log 2

Making the reasonable estimate that the loudness of one baby is equivalent to the average background noise of about 80 dB in a factory, twins will only increase this to 83 dB and triplets to approximately 84.8 dB.

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