Predictions of formant-frequency discrimination in noise based on model auditory-nerve responses

被引：0

作者：

Tan, Qing ^{[1
]}

Carney, Laurel H. ^{[1
,2
,3
]}

机构：

[1] Boston University Hearing Research Center, Department of Biomedical Engineering, Boston University, 44 Cummington Street, Boston, MA 02215, United States

[2] Departments of Biomedical and Chemical Engineering and Electrical Engineering and Computer Science, Institute for Sensory Research, Syracuse University, 621 Skytop Road, Syracuse, NY 13244, United States

[3] Institute for Sensory Research, Syracuse University, 621 Skytop Road, Syracuse, NY 13244, United States

来源：

Journal of the Acoustical Society of America | 2006年 / 120卷 / 03期

关键词：

To better understand how the auditory system extracts speech signals in the presence of noise; discrimination thresholds for the second formant frequency were predicted with simulations of auditory-nerve responses. These predictions employed either average-rate information or combined rate and timing information; and either populations of model fibers tuned across a wide range of frequencies or a subset of fibers tuned to a restricted frequency range. In general; combined temporal and rate information for a small population of model fibers tuned near the formant frequency was most successful in replicating the trends reported in behavioral data for formant-frequency discrimination. To explore the nature of the temporal information that contributed to these results; predictions based on model auditory-nerve responses were compared to predictions based on the average rates of a population of cross-frequency coincidence detectors. These comparisons suggested that average response rate (count) of cross-frequency coincidence detectors did not effectively extract important temporal information from the auditory-nerve population response. Thus; the relative timing of action potentials across auditory-nerve fibers tuned to different frequencies was not the aspect of the temporal information that produced the trends in formant-frequency discrimination thresholds. © 2006 Acoustical Society of America;

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摘要：

Journal article (JA)

引用

页码：1435 / 1445