Comodulation detection differences for fixed-frequency and roved-frequency maskers

被引：0

作者：

Hall III, Joseph W. ^{[1
]}

Buss, Emily ^{[1
]}

Grose, John H. ^{[1
]}

机构：

[1] Department of Otolaryngology/Head and Neck Surgery, University of North Carolina School of Medicine, Chapel Hill, NC 27599, United States

来源：

Journal of the Acoustical Society of America | 2006年 / 119卷 / 02期

关键词：

This study investigated comodulation detection differences (CDD) for fixed- and roved-frequency maskers. The objective was to determine whether CDD could be accounted for better in terms of energetic masking or in terms of perceptual fusion/segregation related to comodulation. Roved-frequency maskers were used in order to minimize the role of energetic masking; allowing possible effects related to perceptual fusion/segregation to be revealed. The signals and maskers were composed of 30-Hz-wide noise bands. The signal was either comodulated with the masker (A/A condition) or had a temporal envelope that was independent (A/B condition). The masker was either gated synchronously with the signal or had a leading temporal fringe of 200 ms. In the fixed-frequency masker conditions; listeners with low A/A thresholds showed little masking release due to masker temporal fringe and had CDDs that could be accounted for by energetic masking. Listeners with higher A/A thresholds in the fixed-frequency masker conditions showed relatively large CDDs and large masking release due to a masker temporal fringe. The CDDs of these listeners may have arisen; at least in part; from processes related to perceptual segregation. Some listeners in the roved masker conditions also had large CDDs that appeared to be related to perceptual segregation. © 2006 Acoustical Society of America;

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学科分类号：

摘要：

Journal article (JA)

引用

页码：1021 / 1028

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