You are standing 2.50 m directly in front of one of the two loudspeakers shown in Figure

Question:

You are standing 2.50 m directly in front of one of the two loudspeakers shown in Figure P16.60. They are 3.00 m apart and both are playing a 686 Hz tone in phase. As you begin to walk directly away from the speaker, at what distances from the speaker do you hear a minimum sound intensity? The room temperature is 20°C.

FIGURE P16.60 3.00 m 2.50 m Walk