You are standing 2.5 m directly in front of one of the two loudspeakers shown in the figure. They are 3.0 m apart and both are playing a 686 Hz tone in phase. (Figure 1) You may assume that the room is 20 C in this example such that the speed of sound is 343 m/s.
1. What is the largest distance from the top speaker at which you would hear a minimum sound intensity?