ard hemisphere, dB sound t of and 2.5 m

University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter16: Waves
Section: Chapter Questions
Problem 83P: A microphone receiving a pure sound tone feeds an oscilloscope, producing a wave on its screen. If...
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A loudspeaker, mounted on a tall pole, is engineered to
emit 75% of its sound energy into the forward hemisphere,
25% toward the back. You measure an 85 dB sound
intensity level when standing 1.0 m in front of and 2.5 m
below the speaker.
Part A
What is the speaker's power output?
Express your answer with the appropriate units.
► View Available Hint(s)
Transcribed Image Text:A loudspeaker, mounted on a tall pole, is engineered to emit 75% of its sound energy into the forward hemisphere, 25% toward the back. You measure an 85 dB sound intensity level when standing 1.0 m in front of and 2.5 m below the speaker. Part A What is the speaker's power output? Express your answer with the appropriate units. ► View Available Hint(s)
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