In Exercises 4750, use the following information for
Chapter , Problem 5.5.50(choose chapter or problem)
In Exercises 4750, use the following information for determining sound intensity. The level of sound in decibels, with an intensity of is given by where is an intensity of watt per square meter, corresponding roughly to the faintest sound that can be heard by the human ear. In Exercises 47 and 48, find the level of sound Due to the installation of a muffler, the noise level of anengine decreased from 88 to 72 decibels. Find thepercent decrease in the intensity level of the noise asa result of the installation of the muffler.
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