In a certain home sound system, two small speakers are located so that one is 80.0 cm closer to the listener than the other. For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of interference from two loudspeakers. Part A For what frequencies of audible sound will these speakers produce destructive interference at the listener? (Find only the three lowest audible frequencies.) Express your answer(s) in hertz, there is more than one value, separate your answers by commas. VO AE ? f = Hz Submit Request Answer Part B For what frequencies of audible sound will these speakers produce constructive interference at the listener? (Find only the three lowest audible frequencies). Express your answer(s) in hertz, there is more than one value, separate your answers by commas. f = Hz Submit Request Answer

In a certain home sound system, two small speakers are located so that one is 80.0 cm closer to the listener than the other. For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of interference from two loudspeakers. Part A For what frequencies of audible sound will these speakers produce destructive interference at the listener? (Find only the three lowest audible frequencies.) Express your answer(s) in hertz, there is more than one value, separate your answers by commas. VO AE ? f = Hz Submit Request Answer Part B For what frequencies of audible sound will these speakers produce constructive interference at the listener? (Find only the three lowest audible frequencies). Express your answer(s) in hertz, there is more than one value, separate your answers by commas. f = Hz Submit Request Answer

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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Two loudspeakers, A and B, are driven by the same amplifier and emit sinusoidal waves in phase. The frequency of the waves emitted by each speaker is 697 Hz. You are standing between the speakers, along the line connecting them and are at a point of constructive interference. For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of Loudspeaker interference Part A How far must you walk toward speaker B to move to reach the first point of destructive interference? Take the speed of sound to be 344 m/s. Express your answer in meters. x = 17 ΑΣΦ Submit Request Answer ? m
Constants I Periodic Consider a sine wave traveling down the stretched two- part cord of the figure.(Figure 1) Determine a formula for the ratio of the wavelengths in the two sections. (The frequency is the same in both sections.) Express your answer in terms of the variables µH and uL. ? Ан Submit Request Answer Figure 1 of 1 Part C Light section Heavy section Is the wavelength larger in the heavier cord or the lighter? (a) in the heavier cord Transmitted in the lighter cord pulse Submit Request Answer Reflected pulse (b) Provide Feedback II
Consider a pipe that is closed at one end. Sketch the standing wave pattern in each of the following situations to show the regions of greatest and least air pressure variations (pressure antinodes and nodes, which are different from displacement antinodes and nodes). Then formulate equations that relate the wavelength å and frequency f to the length L of the pipe. a) Tube with both ends open (“open tube"): fundamental. 2 = b) Tube with both ends open (“open tube"): first overtone (2nd harmonic). aー c) Find the ratio between fundamental and first overtone frequencies: f/f = d) Tube with one open end (“closed tube"): fundamental. e) Tube with one open end (“closed tube"): first overtone (3rd harmonic). f3 = f) Find the ratio of the first overtone and fundamental frequencies: /f =
Biologists think that some spiders "tune" strands of their web to give enhanced response at frequencies corresponding to those at which desirable prey might struggle. Orb spider web silk has a typical diameter of 20 μm, and spider silk has a density of 1300 kg/m³. To have a fundamental frequency at 150 Hz, to what tension must a spider adjust a 20 cm - long strand of silk? Express your answer with the appropriate units. T. = μÅ Value Units Review ?
A loudspeaker on a pole at the same height as your ears is radiating 100 W of sound energy in all directions. You are walking directly toward the speaker at 0.60 m/s. Assume your ears are 20 m away from the loudspeaker itself and, although it is not realistic, ignore all reflections of sound from nearby objects such as the ground. What is the sound intensity level at the location of your ears? Express your answer with dB units. ► View Available Hint(s) B Submit Part B dß dt = Submit μÀ || Value What is the rate (dB/s) at which the sound intensity level is increasing? Hint: Use the chain rule and the relationship log₁0 x = ln x/ ln 10. Express your answer in decibels per second. ► View Available Hint(s) Units VE ΑΣΦ www ? ? dB/s
The ability to hear a "pin drop" is the sign of sensitive hearing. Suppose a 0.53 g pin is dropped from a height of 31 cm, and that the pin emits sound for 1.4 s when it lands. Part A Assuming all of the mechanical energy of the pin is converted to sound energy, and that the sound radiates uniformly in all directions, find the maximum distance from which a person can hear the pin drop. (This is the ideal maximum distance, but atmospheric absorption and other factors will make the actual maximum distance considerably smaller.) Express your answer using two significant figures. Hνα ΑΣφ ? r = km
Two loudspeakers emit identical sound waves along the x-axis. The sound at a point on the axis has maximum intensity when the speakers are 22 cm apart. The sound intensity decreases as the distance between the speakers is increased, reaching zero at a separation of 33 cm. Part A What is the wavelength of the sound? Part B If the distance between the speakers continues to increase, at what separation will the sound intensity again be a maximum?
During takeoff, the sound intensity level of a jet engine is 170 dB at a distance of 24 m. Part A What is the sound intensity level at a distance of 1.0 km? Express your answer to two significant figures and include the appropriate units. B = Submit Value Units Previous Answers Request Answer ?
3 rces The sound of normal breathing is not very loud, with an intensity of about 11 dB at a distance of 1 m away from the face of the breather. Note that in this problem sound intensity in decibels is denoted 3; intensity in W/m² is denoted I View Available Hint(s) distance Ddetect in meters. Ddetect = 3.16 m Submit Previous Answers ✓ Correct Part B In general, if a sound has intensity of 3 dB at 1 m from the source, at what distance de from the source would the decibel level decrease to 0 dB? Since the limit of hearing is 0 dB this would mean you could no longer hear it. Express the distance in terms of B. Be careful about your signs! View Available Hint(s) Submit IVE] ΑΣΦ do 3.55 3 Previous Answers X Incorrect; Try Again; 5 attempts remaining < Return to Assignment Provide Feedback P Pearson m Copyright © 2022 Pearson Education Inc. All rights reserved. | Terms of Use | Privacy Policy | Permissions | Contact Us |
Chapter 17, Problem 020 The figure shows four isotropic point sources of sound that are uniformly spaced on an x axis. The sources emit sound at the same wavelength and same amplitude sm, and they emit in phase. A point P is shown on the x axis. Assume that as the sound waves travel to P, the decrease in their amplitude is negligible. What multiple of sm is the amplitude of the net wave at P if distance d in the figure is (a)1A, (b)2, and (c)4/? (a) Number (b) Number (c) Number Units Units Units S₁ Sa Sa + S₁
Part A The ability to hear a "pin drop" is the sign of sensitive hearing. Suppose a 0.48 g pin is dropped from a height of 29 cm, and that the pin emits sound for 1.3 s when it lands. Assuming all of the mechanical energy of the pin is converted to sound energy, and that the sound radiates uniformly in all directions, find the maximum distance from which a person can hear the pin drop. (This is the ideal maximum distance, but atmospheric absorption and other factors will make the actual maximum distance considerably smaller.) Express your answer using two significant figures. km
Со A bat flies toward a moth at speed 7.5 m/s while the moth is flying toward the bat at speed 5.0 m/s. The bat emits a sound wave of 51.35 kHz. Part A What is the frequency of the wave detected by the bat after that wave reflects off the moth? Express your answer to two significant figures and include the appropriate units. HÀ ? f = Value Units Submit Request Answer