At a Distance of 20 M from a Sound Source

question 20

Multiple Choice

At a distance of 20 m from a sound source the intensity level is 60 dB.What is the intensity level (in dB) at a point 2.0 m from the source? Assume that the source radiates equally in all directions.

• A)80 dB
• B)45 dB
• C)62 dB
• D)87 dB
• E)95 dB