Interaural Phase Difference

Coincident with the interaural time delay, varies systematically with source azimuth and wavelength due to distance from source and refraction around the head. This is the dominant cue for horizontal localization for frequencies up to 1500 Hz.

interaural time delayRayleigh noted that human listeners are sensitive to differences in the phase of low frequency tones at the two ears. He concluded that the phase difference between the two ears caused by an arrival-time delay (Interaural Time Delay - ITD) might be used as a localization cue at low frequencies.

See also: Head Related Transfer Function, Interaural Cross-Correlation Coefficient, Interaural Level Difference, Interaural Time Difference.

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Subjects: Audio Noise & Vibration