A LaGuardia Physics Professor is in the front row at a concert of Grateful Dead rock band, he is 4.2 meters away from the speaker. If the professor hears the sound at a level of B₁ = 131 dB, what is the intensity of the sound at this distance? The intensity of the sound, I₁ = 1.2589254 Units W/m^2 What will be the intensity of the sound if the professor walks 33.7 m away from the speaker? What will be the intensity level at this distance? The intensity of the sound, 12 = 0.1953387✔ Units W/m^2 The corresponding intensity level, B₂: How far from the speaker should the professor go to reduce the should level to 75 dB? The distance, d = = 112.907 ✓Units dB Units km

A LaGuardia Physics Professor is in the front row at a concert of Grateful Dead rock band, he is 4.2 meters away from the speaker. If the professor hears the sound at a level of B₁ = 131 dB, what is the intensity of the sound at this distance? The intensity of the sound, I₁ = 1.2589254 Units W/m^2 What will be the intensity of the sound if the professor walks 33.7 m away from the speaker? What will be the intensity level at this distance? The intensity of the sound, 12 = 0.1953387✔ Units W/m^2 The corresponding intensity level, B₂: How far from the speaker should the professor go to reduce the should level to 75 dB? The distance, d = = 112.907 ✓Units dB Units km

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter14: Sound

Section: Chapter Questions

Problem 22P: An outside loudspeaker (considered a small source) emits sound waves with a power output of 100 W....

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In Figure OQ14.3, a sound wave of wavelength 0.8 m divides into two equal parts that recombine to interfere constructively, with the original difference between their path lengths being |r2 − r1| = 0.8 m. Rank the following situations according to the intensity of sound at the receiver from the highest to the lowest. Assume the tube walls absorb no sound energy. Give equal ranks to situations in which the intensity is equal. (a) From its original position, the sliding section is moved out by 0.1 m. (b) Next it slides out an additional 0.1 m. (c) It slides out still another 0.1 m. (d) It slides out 0.1 m more. Figure OQ14.3
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