Multiple Choice
A very loud train whistle has an acoustic power output of 100 W.If the sound energy spreads out spherically,what is the intensity level in dB at a distance of 89.0 meters from the train? (I0 = 10−12 W/m2)
A) 20.7 dB
B) 70.0 dB
C) 90.0 dB
D) 95.0 dB
E) 207 dB
Correct Answer:
Verified
Correct Answer:
Verified
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