The Influence of Cochlear Mechanical Dysfunction, Temporal Processing Deficits, and Age on the Intelligibility of Audible Speech in Noise for Hearing-Impaired Listeners.
The Influence of Cochlear Mechanical Dysfunction, Temporal Processing Deficits, and Age on the Intelligibility of Audible Speech in Noise for Hearing-Impaired Listeners.
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DOI：
10.1177/2331216516641055
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发表时间：
2016-09-07
影响因子：
2.7
通讯作者：
Lopez-Poveda EA
中科院分区：
文献类型：
--
作者：
Johannesen PT;Pérez-González P;Kalluri S;Blanco JL;Lopez-Poveda EA
本研究的目的是评估耳蜗机械功能障碍的相对重要性，时间处理缺陷，和年龄的听力受损的听众在嘈杂的背景下理解语音的能力。68名听众参加了这项研究。他们提供了线性，频率特定的放大，以补偿他们的听力损失，和可懂度进行了评估的语音成形噪声（SSN）和时间反转的两个谈话者掩蔽（R2TM）。从以前的研究中可以获得耳蜗增益损失和残余压缩的行为估计，并将其用作耳蜗机械功能障碍的指标。使用频率调制检测阈值评估时间处理能力。年龄、测听阈值以及测听阈值和耳蜗增益损失之间的差异也包括在分析中。逐步多元线性回归模型被用来评估可懂度的各种因素的相对重要性。结果表明：（a）耳蜗增益损失与可懂度无关，（B）残余耳蜗压缩与SSN中的可懂度有关，但与R2 TM中的可懂度无关，（c）时间处理与R2 TM中的可懂度密切相关，而与SSN中的可懂度关系不大，（d）年龄本身损害了可懂度。总之，所有因素都会影响可懂度，但它们的相对重要性因掩蔽物而异。
The aim of this study was to assess the relative importance of cochlear mechanical dysfunction, temporal processing deficits, and age on the ability of hearing-impaired listeners to understand speech in noisy backgrounds. Sixty-eight listeners took part in the study. They were provided with linear, frequency-specific amplification to compensate for their audiometric losses, and intelligibility was assessed for speech-shaped noise (SSN) and a time-reversed two-talker masker (R2TM). Behavioral estimates of cochlear gain loss and residual compression were available from a previous study and were used as indicators of cochlear mechanical dysfunction. Temporal processing abilities were assessed using frequency modulation detection thresholds. Age, audiometric thresholds, and the difference between audiometric threshold and cochlear gain loss were also included in the analyses. Stepwise multiple linear regression models were used to assess the relative importance of the various factors for intelligibility. Results showed that (a) cochlear gain loss was unrelated to intelligibility, (b) residual cochlear compression was related to intelligibility in SSN but not in a R2TM, (c) temporal processing was strongly related to intelligibility in a R2TM and much less so in SSN, and (d) age per se impaired intelligibility. In summary, all factors affected intelligibility, but their relative importance varied across maskers.
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