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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.
95. a. Find the sound level of a jet plane taking off if its intensity is 1015 times the intensity of
b. Find the sound level of the noise from city traffic if its intensity is 109 times
c. How many times more intense is the sound of a jet plane taking off than noise from city traffic?
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Chapter 4 Solutions
COLLEGE ALG.+TRIG.(LL)-W/ACCESS>CUSTOM<
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