Two loudspeakers emit sound waves along the x-axis. A listener in front of both speakers hears a maximum sound intensity when speaker 2 is at the origin and speaker 1 is at x = 0.50 m. If speaker 1 is slowly moved forward, the sound intensity decreases and then increases, reaching another maximum when speaker 1 is at x = 0.90 m. a. What is the frequency of the sound? Assume vsound = 340 m/s. b. What is the phase difference between the speakers?

Physics 213 // Week 1 Notes PSU Spring Term, 2017 Chapter 15 Notes _____ = Formula Questions to understand before doing homework: Q: What is oscillation A: Oscillation is the movement back and forth at a certain speed.(Think swinging) Q: What is frequency, f A: Frequency, f, of periodic, or oscillatory, motion is the number of oscillations (swings back and forth) per second. In the SI system, it is measured in hertz: 1 Hz = 1 s^-1 (1 hertz = 1/1 second) Q: What is the period T (T represents the period) A: The time required for one complete oscillation, or cycle. This can be written as 1 T = or… period of oscillation = 1/frequency