A person determines the direction from which a sound comes by means of two mechanisms. One compares the loudness of the sound in one ear with that in the other ear, which is most effective at low frequencies. The other compares the phases of the waves that arrive at the two ears, which is most effective at high frequencies. (The phase of a wave is the part of its cycle it is in at a particular time and place.) The crossover point of equal effectiveness occurs at about 1200 Hz, and as a result, sound with frequencies in the vicinity of 1200 Hz are difficult to locate. How does the wavelength of a 1200- Hz sound compare with the distance between your ears?