97. ••The steady drone of rush hour traffic persists on a stretch of freeway for 4 h each day. A nearby resident undertakes a plan to harness the wasted sound energy and use it for her home. She mounts a 1-m? “micro- phone" that absorbs 30% of the sound that hits it. If the ambient sound level is 100 dB, calculate the amount of sound energy that is collected. Do you think her plan is "sound"? How could you improve it? SSM

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
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Chapter7: Forced Convection Inside Tubes And Ducts
Section: Chapter Questions
Problem 7.33P
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97. •The steady drone of rush hour traffic persists on a
stretch of freeway for 4 h each day. A nearby resident
undertakes a plan to harness the wasted sound energy
and use it for her home. She mounts a 1-m2 "micro-
phone" that absorbs 30% of the sound that hits it. If the
ambient sound level is 100 dB, calculate the amount of
sound energy that is collected. Do you think her plan is
"sound"? How could you improve it? SSM
Transcribed Image Text:97. •The steady drone of rush hour traffic persists on a stretch of freeway for 4 h each day. A nearby resident undertakes a plan to harness the wasted sound energy and use it for her home. She mounts a 1-m2 "micro- phone" that absorbs 30% of the sound that hits it. If the ambient sound level is 100 dB, calculate the amount of sound energy that is collected. Do you think her plan is "sound"? How could you improve it? SSM
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