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 10 = 10-12 W/m2 (watts per square meter). The sound level L, or "loudness" of sound, is where I is the intensity of the given sound. Use this formula for Exercise. measured in decibels (dB) as L = 10 log( a. Find the sound level of a motorcycle if its intensity is 1010 times 10. b. Find the sound level of a vacuum cleaner if its intensity is 107 times 10. c. How many times more intense is the sound of a motorcycle than a vacuum cleaner? 935 936

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 10 = 10-12 W/m2 (watts per square meter). The sound level L, or "loudness" of sound, is where I is the intensity of the given sound. Use this formula for Exercise. measured in decibels (dB) as L = 10 log( a. Find the sound level of a motorcycle if its intensity is 1010 times 10. b. Find the sound level of a vacuum cleaner if its intensity is 107 times 10. c. How many times more intense is the sound of a motorcycle than a vacuum cleaner? 935 936

Algebra and Trigonometry (6th Edition)

6th Edition

ISBN:9780134463216

Author:Robert F. Blitzer

Publisher:Robert F. Blitzer

ChapterP: Prerequisites: Fundamental Concepts Of Algebra

Section: Chapter Questions

Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...

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Question

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 10 = 10-12 W/m2 (watts per square meter). The sound level L, or "loudness" of sound, is
where I is the intensity of the given sound. Use this formula for Exercise.
measured in decibels (dB) as L = 10 log(
a. Find the sound level of a motorcycle if its intensity is 1010 times 10.
b. Find the sound level of a vacuum cleaner if its intensity is 107 times 10.
c. How many times more intense is the sound of a motorcycle than a vacuum cleaner?
935
936

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