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Sound Intensity
18. Waves & Sound / Sound Intensity / Problem 4

You're attending a concert and you're curious about the power of the loudspeakers being used. The main loudspeaker, installed on a tower on the stage, is designed to project 82% of its acoustic energy toward the audience, and 18% toward the backstage area. While standing 2.3 meters in front of and 1.2 meters below the loudspeaker, you measure a sound intensity level of 92 dB. Calculate the power output of the loudspeaker.

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