At a rock concert a dbmeter registered 126db when placed, Ask an Expert

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At a rock concert, a dBmeter registered 126dB when placed 2.3m in front of a loudspeaker on the stage.

1) What was the power output of the speaker, assuming uniform spherical spreading of the sound and neglecting absorption in the air?

2) How far away would the sound level be a somewhat reasonable 92dB?

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