A speaker at the front of a room and an identical speaker at the rear of the room are being driven by the same oscillator at 464 Hz. A student walks at a uniform rate of 1.67 m/s along the length of the room. How many beats does the student hear per second? I have gotten this far its just i dont know where to go from here..simply i dont no how to find v, is it jsut speed of sound ?? F=464 Hz u=1.67 m/s Flow=f(1-u/v) Fhi= f(1+u/v) Fbeat=/ Fhi - Flow / = (2*f*u)/v Whats v??