从语音中去除噪声的最佳阈值在正常和听力障碍人群中相似——时频掩蔽研究。
The optimal threshold for removing noise from speech is similar across normal and impaired hearing-a time-frequency masking study.
机构信息
Department of Speech and Hearing Science, and Center for Cognitive and Brain Sciences, The Ohio State University, Columbus, Ohio 43210,
Department of Computer Science and Engineering, and Center for Cognitive and Brain Sciences, The Ohio State University, Columbus, Ohio 43210,
出版信息
J Acoust Soc Am. 2019 Jun;145(6):EL581. doi: 10.1121/1.5112828.
Abstract
Hearing-impaired listeners' intolerance to background noise during speech perception is well known. The current study employed speech materials free of ceiling effects to reveal the optimal trade-off between rejecting noise and retaining speech during time-frequency masking. This relative criterion value (-7 dB) was found to hold across noise types that differ in acoustic spectro-temporal complexity. It was also found that listeners with hearing impairment and those with normal hearing performed optimally at this same value, suggesting no true noise intolerance once time-frequency units containing speech are extracted.
摘要
听障者在言语感知过程中对背景噪声的容忍度差是众所周知的。本研究采用无天花板效应的语音材料，揭示了在时频掩蔽过程中，在拒绝噪声和保留语音之间的最佳权衡。在声谱时变复杂度不同的噪声类型中，发现了这一相对标准值（-7dB）的有效性。还发现，听力障碍和听力正常的听众在这一相同值下表现最佳，这表明一旦提取包含语音的时频单元，就不存在真正的噪声不耐受。
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