Phase transitions hidden at envelope minima decrease monaural detection of interaural cues

Evidence

In order to generate IPM, the overall magnitude of the carrier IPD was held constant throughout the stimulus, but the ear at which the signal was leading in phase was periodically modulated between right and left. Each IPM was applied instantaneously at a minimum in the modulation cycle in order to minimize the (monaural) salience of the instantaneous phase transition (see Fig. — Dijk, Pim van, Physiology, Psychoacoustics and…, 2955

Categorization

• DEFINE: Explains what IPM (interaural phase modulation) is and why transitions are placed at envelope minima — a technique ensuring the EEG response measures binaural rather than monaural processing.
• corroborated: 2 independent passages support this claim — Dijk, Pim van, Physiology, Psychoacoustics and…, 2955
• XREF: connects to: The superior olivary complex sharpens phase locking to enable left-right sound localization; Phase alignment creates a ‘buzzy’ timbre perceptible without room reflections; Binaural localization accuracy depends on monaural coding efficiency before interaural comparison (+1 more)