Two identical loudspeakers that are 5.00 m apart and face toward each other are driven in phase by the same oscillator at a frequency of 875 Hz. The speed of sound in the room is 344 m/s. If you start out standing midway between the speakers, find the shortest distance you can walk toward either speaker in order to hear a minimum of sound.
A) 0.0983 m
B) 0.197 m
C) 0.295 m
D) 0.393 m
E) 0.590 m

Question

Quizplus · Accepted Answer

The shortest distance to a minimum is one-quarter of a wavelength, which is:$$\lambda/4=\frac{v}{4f}=\frac{344	ext{ m/s}}{4(875	ext{ Hz})}=\boxed{0.0983	ext{ m}}$$

Two Identical Loudspeakers That Are 5