What was the power output of the speaker

Reference no: EM13342461

At a rock concert, a dB meter registered126dB when placed 2.8m in front of a loudspeaker on the stage. The intensity of the reference level required to determine the sound level is 1.0×10?12W/m2.

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

Part B How far away would the sound level be 85dB?

Reference no: EM13342461

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