Question: Two speakers, such as those shown in Fig., are separated by a distance d = 1m and emit sound waves of frequency 1kHz. Calculate the smallest three angles θ for (a) constructive and (b) destructive interference. If D = 30m, at what locations y should observers stand in order to observe constructive interference?
Fig. - Geometry of the two speaker interference experiment; the origin of the x-y coordinate system is at the midpoint of the line AE connecting the two speakers.