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Low-frequency interaural time differences are resistant to across-frequency binaural interference across a range of overall levels.

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Title: Low-frequency interaural time differences are resistant to across-frequency binaural interference across a range of overall levels.
Authors: Bilokon, Anhelina1 (AUTHOR) abilokon@umd.edu, Choi, Allison1 (AUTHOR), Goupell, Matthew J.1 (AUTHOR)
Source: Journal of the Acoustical Society of America. May2026, Vol. 159 Issue 5, p4392-4401. 10p.
Subjects: Interaural time difference, Audio frequency, Noise, Directional hearing
Abstract: Low-frequency interaural time differences (ITDs) are the primary human horizontal-plane localization cue. Across-frequency binaural interference tasks, which assess changes in ITD sensitivity in the presence of a remote interferer, reveal how listeners weigh binaural information across frequency regions. Low-frequency (0.5-kHz) targets experience less interference from high-frequency (4-kHz) interferers compared to the reverse, but the role of relative signal level across frequencies remains relatively underexplored. This study measured ITD discrimination thresholds in ten young normal-hearing listeners using target and interferer frequencies of 0.5, 4, and 8 kHz and levels of 35, 55, and 75 dB-A. Binaural interference magnitude depended on both stimulus level and frequency. For a 4-kHz target and 0.5-kHz interferer, interference significantly increased with increasing interferer and decreasing target levels. For a 0.5-kHz target and 4-kHz interferer, interference significantly increased with increasing interferer level when the target level was 35 dB-A, but was unchanged when the target level was 55 or 75 dB-A. The resistance to binaural interference for the low-frequency target at higher target levels confirms the robustness of low-frequency ITD processing and highlights the level-dependent vulnerability of high-frequency targets to interference. This helps advance understanding of spatial hearing for complex stimuli in more realistic auditory scenes. [ABSTRACT FROM AUTHOR]
Copyright of Journal of the Acoustical Society of America is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
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  Label: Title
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  Data: Low-frequency interaural time differences are resistant to across-frequency binaural interference across a range of overall levels.
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  Data: <searchLink fieldCode="AR" term="%22Bilokon%2C+Anhelina%22">Bilokon, Anhelina</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> abilokon@umd.edu</i><br /><searchLink fieldCode="AR" term="%22Choi%2C+Allison%22">Choi, Allison</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Goupell%2C+Matthew+J%2E%22">Goupell, Matthew J.</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+the+Acoustical+Society+of+America%22">Journal of the Acoustical Society of America</searchLink>. May2026, Vol. 159 Issue 5, p4392-4401. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Interaural+time+difference%22">Interaural time difference</searchLink><br /><searchLink fieldCode="DE" term="%22Audio+frequency%22">Audio frequency</searchLink><br /><searchLink fieldCode="DE" term="%22Noise%22">Noise</searchLink><br /><searchLink fieldCode="DE" term="%22Directional+hearing%22">Directional hearing</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Low-frequency interaural time differences (ITDs) are the primary human horizontal-plane localization cue. Across-frequency binaural interference tasks, which assess changes in ITD sensitivity in the presence of a remote interferer, reveal how listeners weigh binaural information across frequency regions. Low-frequency (0.5-kHz) targets experience less interference from high-frequency (4-kHz) interferers compared to the reverse, but the role of relative signal level across frequencies remains relatively underexplored. This study measured ITD discrimination thresholds in ten young normal-hearing listeners using target and interferer frequencies of 0.5, 4, and 8 kHz and levels of 35, 55, and 75 dB-A. Binaural interference magnitude depended on both stimulus level and frequency. For a 4-kHz target and 0.5-kHz interferer, interference significantly increased with increasing interferer and decreasing target levels. For a 0.5-kHz target and 4-kHz interferer, interference significantly increased with increasing interferer level when the target level was 35 dB-A, but was unchanged when the target level was 55 or 75 dB-A. The resistance to binaural interference for the low-frequency target at higher target levels confirms the robustness of low-frequency ITD processing and highlights the level-dependent vulnerability of high-frequency targets to interference. This helps advance understanding of spatial hearing for complex stimuli in more realistic auditory scenes. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of the Acoustical Society of America is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1121/10.0043871
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      – Code: eng
        Text: English
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        PageCount: 10
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      – SubjectFull: Interaural time difference
        Type: general
      – SubjectFull: Audio frequency
        Type: general
      – SubjectFull: Noise
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      – SubjectFull: Directional hearing
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      – TitleFull: Low-frequency interaural time differences are resistant to across-frequency binaural interference across a range of overall levels.
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            NameFull: Bilokon, Anhelina
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            NameFull: Choi, Allison
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              M: 05
              Text: May2026
              Type: published
              Y: 2026
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