Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 16, Problem 6P
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Two speakers connected to the same frequency generator emit a sound with afrequency of 500 Hz. As a person walks around in the room, he finds areas wherethe sound becomes loud and clear and areas where it is more muffled. At one spotwhere the sound is a maximum, the student is 3.2 m from one speaker. What isthe closest possible distance he could be to the other speaker?
You sit in the center of a room that includes an amazing surround-sound system, consistingof 10 speakers (all of which are equidistant from your ears). You play a tone from all 10 speakersat once, but they have randomly-distributed relative phases, so you hear the same volume as ifyou turned up the power coming through a single speaker by a factor of 10. From this arrangementyou hear the tone at an intensity level of 35 dB. Next you reconfigure the speakers so that theyplay the tones in phase. If the volume of each speaker is the same as before, what is the decibellevel of this new sound?
As the number of people at a party increases,you must raise your voice for a listener to hear you againstthe background noise of the other partygoers. However, once youreach the level of yelling, the only way you can be heard is if youmove closer to your listener, into the listener’s “personal space.”Model the situation by replacing you with an isotropic point sourceof fixed power P and replacing your listener with a point that absorbspart of your sound waves.These points are initially separatedby ri=1.20 m. If the background noise increases by b=5 dB, thesound level at your listener must also increase.What separation rfis then required?
Chapter 16 Solutions
Physics for Scientists and Engineers
Ch. 16 - Prob. 1PCh. 16 - Prob. 2PCh. 16 - Prob. 3PCh. 16 - Prob. 4PCh. 16 - Prob. 5PCh. 16 - Prob. 6PCh. 16 - Prob. 7PCh. 16 - Prob. 8PCh. 16 - Prob. 9PCh. 16 - Prob. 10P
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