Responses to dichotic tone-in-noise stimuli in the inferior colliculus
Human listeners are more sensitive to tones embedded in diotic noise when the tones are out-of-phase at the two ears (N0Sπ) than when they are in-phase (N0S0). The difference between the tone-detection thresholds for these two conditions is referred to as the binaural masking level difference (BMLD)...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-12-01
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| Series: | Frontiers in Neuroscience |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fnins.2022.997656/full |
| _version_ | 1797987882240049152 |
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| author | Langchen Fan Kenneth S. Henry Kenneth S. Henry Kenneth S. Henry Laurel H. Carney Laurel H. Carney |
| author_facet | Langchen Fan Kenneth S. Henry Kenneth S. Henry Kenneth S. Henry Laurel H. Carney Laurel H. Carney |
| author_sort | Langchen Fan |
| collection | DOAJ |
| description | Human listeners are more sensitive to tones embedded in diotic noise when the tones are out-of-phase at the two ears (N0Sπ) than when they are in-phase (N0S0). The difference between the tone-detection thresholds for these two conditions is referred to as the binaural masking level difference (BMLD) and reflects a benefit of binaural processing. Detection in the N0Sπ condition has been explained in modeling studies by changes in interaural correlation (IAC), but this model has only been directly tested physiologically for low frequencies. Here, the IAC-based hypothesis for binaural detection was examined across a wide range of frequencies and masker levels using recordings in the awake rabbit inferior colliculus (IC). IAC-based cues were strongly correlated with neural responses to N0Sπ stimuli. Additionally, average rate-based thresholds were calculated for both N0S0 and N0Sπ conditions. The rate-based neural BMLD at 500 Hz matched rabbit behavioral data, but the trend of neural BMLDs across frequency differed from that of humans. |
| first_indexed | 2024-04-11T07:55:18Z |
| format | Article |
| id | doaj.art-d8089c9c54764c5a9cd1f6e7da4ba102 |
| institution | Directory Open Access Journal |
| issn | 1662-453X |
| language | English |
| last_indexed | 2024-04-11T07:55:18Z |
| publishDate | 2022-12-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Neuroscience |
| spelling | doaj.art-d8089c9c54764c5a9cd1f6e7da4ba1022022-12-22T04:35:58ZengFrontiers Media S.A.Frontiers in Neuroscience1662-453X2022-12-011610.3389/fnins.2022.997656997656Responses to dichotic tone-in-noise stimuli in the inferior colliculusLangchen Fan0Kenneth S. Henry1Kenneth S. Henry2Kenneth S. Henry3Laurel H. Carney4Laurel H. Carney5Department of Biomedical Engineering, University of Rochester, Rochester, NY, United StatesDepartment of Biomedical Engineering, University of Rochester, Rochester, NY, United StatesDepartment of Neuroscience, University of Rochester, Rochester, NY, United StatesDepartment of Otolaryngology, University of Rochester, Rochester, NY, United StatesDepartment of Biomedical Engineering, University of Rochester, Rochester, NY, United StatesDepartment of Neuroscience, University of Rochester, Rochester, NY, United StatesHuman listeners are more sensitive to tones embedded in diotic noise when the tones are out-of-phase at the two ears (N0Sπ) than when they are in-phase (N0S0). The difference between the tone-detection thresholds for these two conditions is referred to as the binaural masking level difference (BMLD) and reflects a benefit of binaural processing. Detection in the N0Sπ condition has been explained in modeling studies by changes in interaural correlation (IAC), but this model has only been directly tested physiologically for low frequencies. Here, the IAC-based hypothesis for binaural detection was examined across a wide range of frequencies and masker levels using recordings in the awake rabbit inferior colliculus (IC). IAC-based cues were strongly correlated with neural responses to N0Sπ stimuli. Additionally, average rate-based thresholds were calculated for both N0S0 and N0Sπ conditions. The rate-based neural BMLD at 500 Hz matched rabbit behavioral data, but the trend of neural BMLDs across frequency differed from that of humans.https://www.frontiersin.org/articles/10.3389/fnins.2022.997656/fullbinaural masking level differencebinaural cuesbinaural detectioninteraural correlationmidbrain |
| spellingShingle | Langchen Fan Kenneth S. Henry Kenneth S. Henry Kenneth S. Henry Laurel H. Carney Laurel H. Carney Responses to dichotic tone-in-noise stimuli in the inferior colliculus Frontiers in Neuroscience binaural masking level difference binaural cues binaural detection interaural correlation midbrain |
| title | Responses to dichotic tone-in-noise stimuli in the inferior colliculus |
| title_full | Responses to dichotic tone-in-noise stimuli in the inferior colliculus |
| title_fullStr | Responses to dichotic tone-in-noise stimuli in the inferior colliculus |
| title_full_unstemmed | Responses to dichotic tone-in-noise stimuli in the inferior colliculus |
| title_short | Responses to dichotic tone-in-noise stimuli in the inferior colliculus |
| title_sort | responses to dichotic tone in noise stimuli in the inferior colliculus |
| topic | binaural masking level difference binaural cues binaural detection interaural correlation midbrain |
| url | https://www.frontiersin.org/articles/10.3389/fnins.2022.997656/full |
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