Two loudspeakers are located 2.81 m apart on an outdoor stage. A listener is 24.5 m from one and 26.1 m from the other During the sound check, a signal generator drives the two speakers in phase with the same amplitude and frequency. The transmitted frequency is swept through the audible range (20 Hz to 20 kHz). (a) What is the lowest frequency fmin,1 that gives minimum signal (destructive interference) at the listener's location? By what number must fmin,1 be multiplied to get (b) the second lowest frequency fmin.2 that gives minimum signal and (c) the third lowest frequency fmin,3 that gives minimum signal? (d) What is the lowest frequency fmax,1 that gives maximum signal (constructive interference) at the listener's location? By what number must fmax.1 be multiplied to get (e) the second lowest frequency fmax.2 that gives maximum signal and (f) the third lowest frequency fmax.3 that gives maximum signal? (Take the speed of sound to be 343 m/s.) (a) Number 1 Units (b) Number *2 Units (c) Number *3 Units (d) Number 1-4 Units (e) Number Units (f) Number Units

Two loudspeakers are located 2.81 m apart on an outdoor stage. A listener is 24.5 m from one and 26.1 m from the other During the sound check, a signal generator drives the two speakers in phase with the same amplitude and frequency. The transmitted frequency is swept through the audible range (20 Hz to 20 kHz). (a) What is the lowest frequency fmin,1 that gives minimum signal (destructive interference) at the listener's location? By what number must fmin,1 be multiplied to get (b) the second lowest frequency fmin.2 that gives minimum signal and (c) the third lowest frequency fmin,3 that gives minimum signal? (d) What is the lowest frequency fmax,1 that gives maximum signal (constructive interference) at the listener's location? By what number must fmax.1 be multiplied to get (e) the second lowest frequency fmax.2 that gives maximum signal and (f) the third lowest frequency fmax.3 that gives maximum signal? (Take the speed of sound to be 343 m/s.) (a) Number 1 Units (b) Number 2 Units (c) Number 3 Units (d) Number 1-4 Units (e) Number Units (f) Number Units

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 are located 2.81 m apart on an outdoor stage. A listener is 24.5 m from one and 26.1 m from the other. During the sound check, a signal generator drives the two speakers in phase with the same amplitude and frequency. The transmitted frequency Is swept through the audible range (20 Hz to 20 kHz). (a) What is the lowest frequency fmin.1 that gives minimum signal (destructive interference) at the listener's location? By what number must fmin.1 be multiplied to get (b) the second lowest frequency fmin.2 that gives minimum signal and (c) the third lowest frequency fmin,3 that gives minimum signal? (d) What is the lowest frequency fmax,1 that gives maximum signal (constructive interference) at the listener's location? By what number must fmax,1 be multiplied to get (e) the second lowest frequency fmax.2 that gives maximum signal and (f) the third lowest frequency fmax.3 that gives maximum signal? (Take the speed of sound to be 343 m/s.) (a) Number Units +1 (b) Number *2…
Two loudspeakers are located 2.81m apart on an outdoor stage. A listener is 24.5 m from one and 26.1 m from the other. During the sound check, a signal generator drives the two speakers in phase with the same amplitude and frequency. The transmitted frequency is swept through the audible range (20 Hz to 20 kHz). (a) What is the lowest frequency fmin, that gives minimum signal (destructive interference) at the listener's location? By what number must fmin,1 be multiplied to get (b) the second lowest frequency fmin,2 that gives minimum signal and (c) the third lowest frequency fmin,3 that gives minimum signal? (d) What is the lowest frequency fmax.1 that gives maximum signal (constructive interference) at the listener's location? By what number must fmax.1 be multiplied to get (e) the second lowest frequency fmax,2 that gives maximum signal and (f) the third lowest frequency fmax.3 that gives maximum signal? (Take the speed of sound to be 343 m/s.) a VE es (a) Number T107.19 Units THz…
A speaker has a diameter of 0.30 m. (a) Assuming that the speed of sound is 343 m/s, find the diffraction angle u for a 2.0-kHz tone. (b) What speaker diameter D should be used to generate a 6.0-kHz tone whose diffraction angle is as wide as that for the 2.0-kHz tone in part (a)?
Two loud speakers are located 3.35 m apart on an outdoor stage. A listener is 18.3 m from one and 19.5 m from the other. During the sound check, a signal generator drives the two speakers in phase with the same amplitude and frequency. The transmitted frequency is swept through the audible range (20 Hz to 20 kHz). (a) What is the lowest frequency fmin,1 that gives minimum signal (destructive interference) at the listener’s location? By what number must fmin,1 be multiplied to get (b) the second lowest frequency fmin,2 that gives minimum signal and (c) the third lowest frequency fmin,3 that gives minimum signal? (d) What is the lowest frequency fmax,1 that gives maximum signal (constructive interference) at the listener’s location? By what number must fmax,1 be multiplied to get (e) the second lowest frequency fmax,2 that gives maximum signal and (f) the third lowest frequency fmax,3 that gives maximum signal?
Two loudspeakers are located 4.17 m apart on an outdoor stage. A listener is 21.7 m from one and 23.2 m from the other. During the sound check, a signal generator drives the two speakers in phase with the same amplitude and frequency. The transmitted frequency is swept through the audible range (20 Hz to 20 kHz). (a) What is the lowest frequency fmin 1 that gives minimum signal (destructive interference) at the listener's location? By what number must fmin.1 be multiplied to get (b) the second lowest frequency fmin.2 that gives minimum signal and (c) the third lowest frequency fmin.3 that gives minimum signal? (d) What is the lowest frequency fmax.1 that gives maximum signal (constructive interference) at the listener's location? By what number must fmax.1 be multiplied to get (e) the second lowest frequency fmax.2 that gives maximum signal and (f) the third lowest frequency fmax.3 that gives maximum signal? (Take the speed of sound to be 343 m/s.) (a) Number 114 Units Hz (b) Number 3…
The shortest distance between a sound source (S,) and a reflecting wall is 25 m. The sound is reflected at an angle of a, = 45° to a listener (L,). (a) What is the shortest distance between the sound source and the listener, (x1)? (b) The sound is also reflected to another listener (L2) at an angle of a2= 80°. What is the length of the reflector between the two reflection points, (x2)? X2 = ? Reflector a2 a1 L2 L1 S1 X1 = ?
Two loudspeakers, A and B (Fig. ), are driven by thesame amplifier and emit sinusoidal waves in phase. Speaker B is 2.00 mto the right of speaker A. Consider point Q along the extension ofthe line connecting the speakers, 1.00 m to the right of speaker B.Both speakers emit sound waves that travel directly from the speaker topoint Q. What is the lowest frequency for which (a) constructive interferenceoccurs at point Q; (b) destructive interference occurs at point Q?
Two powerful speakers, separated by 15.00 m, stand on thefloor in front of the stage in a large amphitheater. An aisle perpendicularto the stage is directly in front of one of the speakers and extends50.00 m to an exit door at the back of the amphitheater. (a) If the speakersproduce in-phase, coherent 440 Hz tones, at how many points along theaisle is the sound minimal? (b) What is the distance between the farthestsuch point and the door at the back of the aisle? (c) Suppose the coherentsound emitted from both speakers is a linear superposition of a 440 Hztone and another tone with frequency f. What is the smallest value of fso that minimal sound is heard at any point where the 440 Hz sound isminimal? (d) At how many additional points in the aisle is the 440 Hztone present but the second tone is minimal? (e) What is the distancefrom the closest of these points to the speaker at the front of the aisle?
Two identical speakers are initially equal distancesfrom a listener . Thelistener hears a sound maximum (constructiveinterference). When the upper speaker is moved backby a distance d = 2 m, the listener hears a soundminimum (destructive interference). What is thelongest wavelength the soundwaves could have?
Two small loudspeakers, A and B (Fig. ), are driven by the same amplifierand emit pure sinusoidal waves in phase. (a) For what frequenciesdoes constructive interference occur at point P? (b) For what frequenciesdoes destructive interference occur? The speed of sound is 350 m/s.
In the figure, two loudspeakers, separated by a distance of d; at the position of a listener, who is d, = 3.81 m directly in front of one of the speakers. Consider the audible range for normal hearing, 20 Hz to 20 kHz. (a) What is the lowest frequency that gives the minimum signal (destructive interference) at the listener's ear? (b) What is the lowest frequency that gives the maximum signal (constructive interference) at the listener's ear? (Take the speed of sound to be 343 m/s.) 2.74 m, are in phase. Assume the amplitudes of the sound from the speakers are approximately the same %D di Speakers Listener (a) Number Units (b) Number Units
of A 60-dB sound is reaching he ear drum with cen orea the eardrum in one seco 70mm2. Find e received by he eardrum in pe secon energy