ArticleJournal of the Association for Research in Otolaryngology : JARO2024
The Rapid Decline in Interaural-Time-Difference Sensitivity for Pure Tones Can Be Explained by Peripheral Filtering.
Article in Journal of the Association for Research in Otolaryngology : JARO, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Temporal weighting functions for interaural time and level differences. VI. Effects of pulse rate on modulated envelopes.The Journal of the Acoustical Society of America · 2026Article
- Spectral weighting of interaural time differences near the low-frequency dominant region in young and middle-aged adults.JASA express letters · 2026Article
- Low-frequency interaural time differences are resistant to across-frequency binaural interference across a range of overall levels.The Journal of the Acoustical Society of America · 2026Article
- Testing a dominance-region hypothesis for interaural time discrimination using off-frequency maskers.JASA express letters · 2026Article
- Remote measurement of spectral weighting in sound localization using virtual reality headsets.Proceedings of meetings on acoustics. Acoustical Society of America · 2021Article
- Transmission of Binaural Cues by Bilateral Cochlear Implants: A Comparison of Spectral Peak-Picking and Interleaved Stimulation Strategies.Trends in hearingArticle
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Abstract
purposeThe interaural time difference (ITD) is a primary horizontal-plane sound localization cue computed in the auditory brainstem. ITDs are accessible in the temporal fine structure of pure tones with a frequency of no higher than about 1400 Hz. How listeners' ITD sensitivity transitions from very best sensitivity near 700 Hz to impossible to detect within 1 octave currently lacks a fully compelling physiological explanation. Here, it was hypothesized that the rapid decline in ITD sensitivity is dictated not by a central neural limitation but by initial peripheral sound encoding, specifically, the low-frequency (apical) portion of the cochlear excitation pattern produced by a pure tone.
methodsITD sensitivity was measured in 16 normal-hearing listeners as a joint function of frequency (900-1500 Hz) and level (10-50 dB sensation level).
resultsPerformance decreased with increasing frequency and decreasing sound level. The slope of performance decline was 90 dB/octave, consistent with the low-frequency slope of the cochlear excitation pattern.
conclusionFine-structure ITD sensitivity near 1400 Hz may be conveyed primarily by "off-frequency" activation of neurons tuned to lower frequencies near 700 Hz. Physiologically, this could be realized by having neurons sensitive to fine-structure ITD up to only about 700 Hz. A more extreme model would have only a single narrow channel near 700 Hz that conveys fine-structure ITDs. Such a model is a major simplification and departure from the classic formulation of the binaural display, which consists of a matrix of neurons tuned to a wide range of relevant frequencies and ITDs.
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