If Two loudspeakers are placed at either end of a gymnasium, both pointing toward the center of the gym and equidistant from it. The speakers emit 266 Hz sound that is in phase. An observer at the center of the gym experiences constructive interference. The observer must walk toward either speaker the distance of 0.322 m to first experience destructive interference.

Calculate the distance to the first position of destructive interference if the frequency emitted by the speakers is lowered to 230 Hz .