High-frequency ITD sensitivity is studied via envelope cues using transposed stimuli

Evidence

The low-frequency stimulus was a spectrally shaped multicomponent complex (SSMC), which was a harmonic complex with a fundamental frequency (F 0 ) of 100 Hz. … The high-frequency stimulus was a ˵transposed stimulus,˶ which was a 4-kHz tone carrier amplitude-modulated with a half-wave rectified 125-Hz sinusoid (Bernstein and Trahiotis 2002 ). It is considered that the auditory-nerve firing is phase locked to the modulator waveform, which provides the cue for judging the ITD and modulation rate of the stimulus. — Dijk, Pim van, Physiology, Psychoacoustics and…, 1039

Categorization

• DEFINE: Explains the transposed-stimulus technique for delivering temporal/ITD cues at high carrier frequencies via envelope phase-locking.
• QUESTION: Why is envelope-based phase locking at high carrier frequencies relevant to hearing-impaired encoding of ITDs?
• corroborated: 2 independent passages support this claim — Dijk, Pim van, Physiology, Psychoacoustics and…, 1039