Interaural phase difference varies with frequency while interaural time difference does not

Evidence

Because of this phenomenon, we must consider the relationship between the ITD (which does not depend on frequency) and the interaural phase difference (IPD, which does vary with frequency). We can calculate the IPD for any given frequency from the following equation: 360° * (630 µs/T), where T is the period of the stimulus. — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1465

Categorization

• DEFINE: Distinguishes ITD from IPD and explains their mathematical relation.