The Intensity Level of Sound 20 M from a Jet

question 40

Multiple Choice

The intensity level of sound 20 m from a jet airliner is 120 dB.At what distance from the airplane will the sound intensity level be a tolerable 100 dB? (Assume spherical spreading of sound. )

• A)90 m
• B)120 m
• C)150 m
• D)200 m

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