Sounds are produced when vibrating objects create pressure waves in some medium such as air. When these variations in pressure reach the human eardrum, it causes the eardrum to vibrate in a similar manner and the ear
detects sound. The intensity of sound is measured as power per unit area. The threshold for hearing (minimum sound detectable by a young, healthy ear) is defined to be
Use this formula for Exercises 95-96.
96. a. Find the sound level of a motorcycle if its intensity is 1010 times
b. Find the sound level of a vacuum cleaner if its intensity is 107 times
c. How many times more intense is the sound of a motorcycle than a vacuum cleaner’?
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