# Physics SOUND

What is the resultant sound level when an 80-dB and an 85-dB sound are heard simultaneously?

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1. The 85 dB sound has 3.16 (sqrt 10) times the power of the 80 dB sound. Together, there is 4.16 times as much power as the 80 dB sound.

The dB level is then 10 log 4.16 = 6.2 dB above 80 dB, or 86.2 dB

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