High-frequency tones yield multiple possible source locations from a single phase difference

Evidence

On the other hand, a 5000-Hz tone, which has a period of . ms (200 µs), will cycle about 3.15 times in 630 µs (5000 Hz * 630 * 10−6 s). Because this tone cycles many times over 630 µs, there are multiple sound source locations that result in the same IPD. For a 5000-Hz tone presented to the left ear, the IPD is equal to 1134° [(630 µs/200 µs) * 360°], but this value is equivalent to 774°, 414°, and 54°. In this case, the sound could be originating from one of four azimuthal locations. In this way, phase differences across the ears provide ambiguous information about location on the horizontal plane. — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1467