1) below. The two speakers are each emitting a constant 2500 Hz tone, and the sound waves from the speakers are in phase with each other. A student is standing at point P, which is a distance of 5.0 m from the midpoint between the speakers, and hears a maximum as expected. Assume that reflections from nearby objects are negligible. Use 340 m/s for the speed of sound. Two small speakers S are positioned a distance of 0.75 m from each other, as shown in the diagram The student moves from point P, which is a maximum, towards point Q. The student notices that the sound intensity drops to a minimum, then goes back to a maximum, and then another minimum, before arriving at point Q, which is another maximum. 5.0 m TIS 0.75 m

1) below. The two speakers are each emitting a constant 2500 Hz tone, and the sound waves from the speakers are in phase with each other. A student is standing at point P, which is a distance of 5.0 m from the midpoint between the speakers, and hears a maximum as expected. Assume that reflections from nearby objects are negligible. Use 340 m/s for the speed of sound. Two small speakers S are positioned a distance of 0.75 m from each other, as shown in the diagram The student moves from point P, which is a maximum, towards point Q. The student notices that the sound intensity drops to a minimum, then goes back to a maximum, and then another minimum, before arriving at point Q, which is another maximum. 5.0 m TIS 0.75 m