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QUESTION
At a rock concert, a dB meter registered 130 dB when placed 2.5m in front of a loudspeaker on stage.
At a rock concert, a dB meter registered 130 dB when placed 2.5m in front of a loudspeaker on stage. (a) What was the power output of the speaker, assuming uniform spherical spreading of the sound and neglecting adsorption in the air? (b) How far away would the sound level be 85 dB?
