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 = 112.907 ✓Units dB How far from the speaker should the professor go to reduce the should level to 75 dB? The distance, d = 3.1622776 x 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 = 112.907 ✓Units dB How far from the speaker should the professor go to reduce the should level to 75 dB? The distance, d = 3.1622776 x Units km

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Shock Waves

Shock waves are common in continuum mechanics, and their dominance is attributable to the fact that they are stronger (or even less) compressible. Substantial perturbations propagated as sudden dynamic changes of a compressible medium supersonically. Shock waves are all around us in our daily lives. Lightning, earthquakes, volcanic eruptions, and meteorite impact all produce them in nature. Even the earth, which is protected by its magnetic field, generates a shock wave as in solar wind that travels around 20 Earth radiuses. These shock waves might be either constant, linked to the body, or unsteady, i.e., moving around with time. All of the shocks mentioned above can be damaging, so precautions must be taken to reduce their impact.

Question

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, 1₁
=
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:
=
112.907
Units dB
How far from the speaker should the professor go to reduce the should level to 75 dB?
The distance, d = 3.1622776 x Units km

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