What was the power output of the speaker

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Reference no: EM13257623

At a recent rock concert, a dB meter registered 114 dB when placed 1.30 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?

(in units of W)

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

(in units of m)

Reference no: EM13257623

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