A frequency-selective feedback model of auditory efferent suppression and its implications for the recognition of speech in noise
A frequency-selective feedback model of auditory efferent suppression and its implications for the recognition of speech in noise
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DOI：
10.1121/1.4742745
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发表时间：
2012-09-01
影响因子：
2.4
通讯作者：
Meddis, Ray
中科院分区：
文献类型：
--
作者：
Clark, Nicholas R.;Brown, Guy J.;Meddis, Ray
在竞争噪声的背景下，使用听觉外周的计算机模型研究了外周听觉传出系统对我们理解语音的潜在贡献，并使用自动语音识别系统进行了评估。以前的一项研究表明，对多通道模型的所有通道应用固定的传出衰减可以提高对噪声中连接的数字三元组的识别[G.J.Brown，R.T.Ferry和R.Meddis，J.Acoust]。SoC。上午好。127,943-954(2010)]。在目前的研究中，一个解剖学上合理的反馈回路被用来自动调节每个听觉通道的单独衰减值。这一安排进一步增强了固定衰减条件下的语音识别。多个说话者喋喋不休和粉色噪声干扰条件之间的比较表明，好处来自于模型根据干扰声音的频谱形状分别修改每个通道中的抑制量的能力。(C)2012年美国声学学会。[http://dx.doi.org/10.1121/1.4742745]
The potential contribution of the peripheral auditory efferent system to our understanding of speech in a background of competing noise was studied using a computer model of the auditory periphery and assessed using an automatic speech recognition system. A previous study had shown that a fixed efferent attenuation applied to all channels of a multi-channel model could improve the recognition of connected digit triplets in noise [G. J. Brown, R. T. Ferry, and R. Meddis, J. Acoust. Soc. Am. 127, 943-954 (2010)]. In the current study an anatomically justified feedback loop was used to automatically regulate separate attenuation values for each auditory channel. This arrangement resulted in a further enhancement of speech recognition over fixed-attenuation conditions. Comparisons between multi-talker babble and pink noise interference conditions suggest that the benefit originates from the model's ability to modify the amount of suppression in each channel separately according to the spectral shape of the interfering sounds. (C) 2012 Acoustical Society of America. [http://dx.doi.org/10.1121/1.4742745]