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

College Algebra

10th Edition

ISBN:9781337282291

Author:Ron Larson

Publisher:Ron Larson

Chapter3: Polynomial Functions

Section3.5: Mathematical Modeling And Variation

Problem 7ECP: The kinetic energy E of an object varies jointly with the object’s mass m and the square of the...

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