A fixed ITD spans more cycles at high frequencies than low

Evidence

Because the speed of sound does not vary with frequency, the time for a sound to travel from one ear to another does not depend on frequency. Consequently, both high-frequency and low-frequency sounds will produce an ITD of a fixed amount. However, the availability of this information to the ear does depend on frequency. A fixed delay corresponds to a different number of cycles for a low-frequency sound than for a highfrequency sound. — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1462

Categorization

Category: Causal Relationships

• QUESTION: This sets up a puzzle: if ITD is a fixed delay that maps to different numbers of cycles by frequency, how do neural phase-locking mechanisms use it? Worth pursuing in later text.

Related

• ITDs are frequency-independent physically yet frequency-dependent perceptually. (similarity 0.92)
• Interaural phase difference varies with frequency while interaural time difference does not (similarity 0.82)
• The ear is far less sensitive to phase than to amplitude of frequency components (similarity 0.80)
• Auditory nerve phase locking can encode slow waveform fluctuations across filters (similarity 0.80)
• Short sound durations necessarily produce broad frequency bandwidths. (similarity 0.80)
• Frequency-ripple spacing and emission delay time are inversely related (similarity 0.80)
• Interaural time difference maps derive from precise phase delays, not absolute latencies (similarity 0.80)
• Microsecond ITD precision arises from phase-delay matching, not absolute latency (similarity 0.80)
• The periodic ringing of cochlear inputs sustains phase-based ITD coding for nonperiodic sounds (similarity 0.79)
• The auditory system uses coarse physical delay lines plus fine phase-based matching for ITD (similarity 0.79)
• Level-dependent frequency discrimination contradicts a purely temporal pitch code (similarity 0.79)
• Interaural phase differences can produce time-delay sensations measured at threshold. (similarity 0.79)
• Echo time delay determines which frequency components get filtered out (similarity 0.79)
• Auditory frequency resolution follows relative change, not absolute Hz (similarity 0.79)
• Shorter time windows necessarily blur frequency knowledge in any signal (similarity 0.79)