Determine the power output of the speaker

Reference no: EM13299838

At a recent rock concert, a dB meter registered 130 dB when placed 1.50 m in front of a loudspeaker on the stage.

(a) What was the power output of the speaker, assuming a hemispherical radiation of the sound and neglecting absorption in the air?

(b) How far away would the intensity level be a somewhat reasonable 85 dB?

Reference no: EM13299838

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