|| You are standing 2.5 m directly in front of one of the two loudspeakers shown in FIGURE P17.68. They are 3.0 m apart and both are playing a 686 Hz tone in phase. As you begin to walk directly away from the speaker, at what dis- tances from the speaker do you hear a minimum sound intensity? The room temperature is 20°C.

|| You are standing 2.5 m directly in front of one of the two loudspeakers shown in FIGURE P17.68. They are 3.0 m apart and both are playing a 686 Hz tone in phase. As you begin to walk directly away from the speaker, at what dis- tances from the speaker do you hear a minimum sound intensity? The room temperature is 20°C.

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter27: Wave Optics

Section: Chapter Questions

Problem 19P

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1)Being two pure wave loudspeakers, which are on opposite walls of a 10m long room, in a form of length f = 170 Hz in a coherent way. If we were exactly in the middle of the room, where wave interference is constructive, what is the shortest distance we must move towards one of the speakers for the waves to cancel out completely? Suppose the speed of sound is not 340 m/s.