1. The problem statement, all variables and given/known data Two loudspeakers placed X meters apart are driven in phase by an audio oscillator, whose frequency range is 1300 Hz to 1800 Hz. A point P is located A meters from one loudspeaker and B meters from the other. The speed of sound is 344 m/s. What is the frequency produced by the oscillator, for which constructive interference of sound occurs at point P? 2. Relevant equations 3. The attempt at a solution I don't know how to start.