Question

Two loudspeakers are placed at either end of a gymnasium, both pointing toward the center of the gym and equidistant from it. The speaker emits 266-Hz sound that is in phase. An observer at the center of the gym experiences constructive interference. how far toward either speaker must the observer walk to first experience destructive interference?

Answer 1

dopper effect?

Answer 2

find the wavelength from the frequency, then half of that wavelength is your answer