Two speakers are driven by the same oscillator whose frequency is f. They are located a distance d from each other on a vertical pole. A man walks straight toward the lower speaker in a direction perpendicular to the pole, as shown in Figure P14.10.
(a) How many times will he hear a minimum in sound intensity? (Use f, d, and v as necessary.)
b) How far is he from the pole at these moments? Let v represent the speed of sound, and assume that the ground does not reflect sound. (Use f, d, v, and n as necessary where n = 1, 2, ..., nmax.)
