Comparing auditory filter bandwidths, spectral ripple modulation detection, spectral ripple discrimination, and speech recognition: Normal and impaired hearing
Comparing auditory filter bandwidths, spectral ripple modulation detection, spectral ripple discrimination, and speech recognition: Normal and impaired hearing
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DOI：
10.1121/1.4922700
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发表时间：
2015-07-01
影响因子：
2.4
通讯作者：
Souza, Pamela
中科院分区：
文献类型：
--
作者：
Davies-Venn, Evelyn;Nelson, Peggy;Souza, Pamela
尽管使用了优化可听度的放大，但一些听力损失的听众的语音识别分数仍然很差。除了可听度，研究表明，阈上能力，如频谱和时间处理，可以解释放大语音识别分数的差异。各种不同的方法已被用于测量光谱处理。然而，频谱处理和语音识别之间的关系仍然没有定论。本研究评估了听力正常和听力损失的听者的频谱处理和语音识别之间的关系。窄带频谱分辨率进行了评估，使用听觉滤波器带宽估计从同步陷波噪声掩蔽。宽带光谱处理测量使用光谱涟漪歧视（SRD）的任务和光谱涟漪深度检测（SMD）的任务。三种不同的措施被用来评估未放大和放大的语音识别在安静和噪音。逐步多元线性回归显示，SMD在2.0个周期每倍频程（cpo）显着预测语音评分放大和未放大的语音在安静和噪音。共性分析显示，SMD在2.0 cpo结合SRD和等效矩形带宽措施，以解释回归模型捕获的大部分方差。结果表明，SMD和SRD可能是有前途的临床诊断评估和预测扩增结果的工具。(C)2015年美国声学学会。[http：//dx.doi.org/10.1121/1.4922700]
Some listeners with hearing loss show poor speech recognition scores in spite of using amplification that optimizes audibility. Beyond audibility, studies have suggested that suprathreshold abilities such as spectral and temporal processing may explain differences in amplified speech recognition scores. A variety of different methods has been used to measure spectral processing. However, the relationship between spectral processing and speech recognition is still inconclusive. This study evaluated the relationship between spectral processing and speech recognition in listeners with normal hearing and with hearing loss. Narrowband spectral resolution was assessed using auditory filter bandwidths estimated from simultaneous notched-noise masking. Broadband spectral processing was measured using the spectral ripple discrimination (SRD) task and the spectral ripple depth detection (SMD) task. Three different measures were used to assess unamplified and amplified speech recognition in quiet and noise. Stepwise multiple linear regression revealed that SMD at 2.0 cycles per octave (cpo) significantly predicted speech scores for amplified and unamplified speech in quiet and noise. Commonality analyses revealed that SMD at 2.0 cpo combined with SRD and equivalent rectangular bandwidth measures to explain most of the variance captured by the regression model. Results suggest that SMD and SRD may be promising clinical tools for diagnostic evaluation and predicting amplification outcomes. (C) 2015 Acoustical Society of America. [http://dx.doi.org/10.1121/1.4922700]