5. You live on a busy street, but as a music lover, you want to reduce the traffic noise.(a) If you install special sound-reflecting windows that reduce the sound intensity level (in dB) by 30dB, by what fraction have you lowered the sound intensity lin (W/m?)?(b) If, instead, you reduce the intensity by half, what change (in dB) do you make in the soundintensity level?6. Small speakers A and B are driven in phase at 725 Hz by the same audio oscillator. Both speakersstart out 4.50 m from the listener, but speaker A is slowly moved away as in the figure.a) At what distance d will the sound from the speakers first produce destructive interference at thelistener's location?b) If A is moved even farther away than in part (a), at what distance d will the speakers next producedestructive interference at the listener's location?c) After A starts moving away from its original spot, at what distance d will the speakers first produceconstructive interference at the listener's location?4 50 m-B

(a) Given: The intensity level reduced is 30 dB.

5. You live on a busy street, but as a music lover, you want to reduce the traffic noise. (a) If you install special sound-reflecting windows that reduce the sound intensity level (in dB) by 30 dB, by what fraction have you lowered the sound intensity lin (W/m²)? (b) If, instead, you reduce the intensity by half, what change (in dB) do you make in the sound intensity level?

5. You live on a busy street, but as a music lover, you want to reduce the traffic noise. (a) If you install special sound-reflecting windows that reduce the sound intensity level (in dB) by 30 dB, by what fraction have you lowered the sound intensity lin (W/m²)? (b) If, instead, you reduce the intensity by half, what change (in dB) do you make in the sound intensity level?

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

Stretched string

A stretched string is a wire which is made up of any metal that must have a larger length compared to its thickness. The ends of the wire are fixed, and when they oscillate or are plucked, it produces two reflected transverse waves of the same frequency and same amplitude. The waves or pulses are traveling in alternate directions and superimpose with one another. This waveform is named standing or stationary waves.

Question

5. You live on a busy street, but as a music lover, you want to reduce the traffic noise.
(a) If you install special sound-reflecting windows that reduce the sound intensity level (in dB) by 30
dB, by what fraction have you lowered the sound intensity lin (W/m?)?
(b) If, instead, you reduce the intensity by half, what change (in dB) do you make in the sound
intensity level?
6. Small speakers A and B are driven in phase at 725 Hz by the same audio oscillator. Both speakers
start out 4.50 m from the listener, but speaker A is slowly moved away as in the figure.
a) At what distance d will the sound from the speakers first produce destructive interference at the
listener's location?
b) If A is moved even farther away than in part (a), at what distance d will the speakers next produce
destructive interference at the listener's location?
c) After A starts moving away from its original spot, at what distance d will the speakers first produce
constructive interference at the listener's location?
4 50 m-
B

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