COMPARING RECOGNITION OF DISTORTED SPEECH USING AN EQUIVALENT SIGNAL-TO-NOISE RATIO INDEX
COMPARING RECOGNITION OF DISTORTED SPEECH USING AN EQUIVALENT SIGNAL-TO-NOISE RATIO INDEX
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DOI：
10.1044/jshr.3803.706
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发表时间：
1995-06-01
期刊：
影响因子：
--
通讯作者：
FITZGIBBONS, PJ
中科院分区：
文献类型：
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作者：
GORDONSALANT, S;FITZGIBBONS, PJ
开发了噪声中等效性能指数来比较不同形式的语音失真下的识别。 对有或没有听力损失的年轻和老年听众的语音识别性能进行了评估，评估了在安静和噪声中呈现的未失真语音，以及经过四个时间压缩比和四个混响时间失真的语音。 在具有正常听力的年轻受试者的噪声中获得的数据用于生成归一化回归方程，该方程用于将不同失真条件下的正确性能百分比转换为特定信噪比下未失真语音的等效性能。 在各种条件下获得的等效信噪比的比较允许对不同类型的退化中的语音识别性能进行排序。 数据还表明，年龄和听力损失会影响因混响或时间压缩而降低的语音识别能力。 然而，年龄效应主要在最严重的畸变条件下显现出来。 对噪声中不失真语音的识别会受到听力损失的影响，但不会受到年龄的影响。 这些发现支持了一个假设，即年龄的增加会导致功能信噪比降低。
An index of equivalent performance in noise was developed to compare recognition in different forms of speech distortion. Speech-recognition performance of young and elderly listeners with and without hearing loss was evaluated for undistorted speech presented in quiet and noise, and for speech distorted by four time-compression ratios and by four reverberation times. The data obtained in noise on young subjects with normal hearing served to generate a normalized regression equation, which was used to convert percent-correct performance in different distortion conditions to equivalent performance for undistorted speech at a particular S/N ratio. Comparisons of the equivalent S/N ratios obtained in the various conditions allowed rank-ordering of speech recognition performance in different types of degradation. The data also show that age and hearing loss affect recognition of speech degraded by reverberation or time compression. However, age effects are evident primarily in the most severe distortion conditions. Recognition of undistorted speech in noise was affected by hearing loss but not by age. These findings support a hypothesis that stipulates that increased age produces a reduction in the functional S/N ratio.