The effect of spatial separation on informational masking of speech in normal-hearing and hearing-impaired listeners
The effect of spatial separation on informational masking of speech in normal-hearing and hearing-impaired listeners
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DOI：
10.1121/1.1861598
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发表时间：
2005-04-01
影响因子：
2.4
通讯作者：
Kidd, G
中科院分区：
文献类型：
--
作者：
Arbogast, TL;Mason, CR;Kidd, G
在包含信息掩蔽的多源环境中理解语音的能力可能取决于空间中信号和掩蔽对象的感知排列。在听力正常的听众中，Arbogast等人。作者声明：[J.Acoust.SoC。上午好。112,2086-2098(2002)]发现主要信息掩蔽物的空间释放量为18分贝，而主要能量掩蔽物的空间释放量为7分贝。这篇文章扩展了早期的工作，包括对感音神经性听力损失的听者的研究。听者在两种空间条件下进行闭合语音识别：信号和掩蔽者之间的0度和90度分离。对三个掩蔽者进行了测试：(1)不同频段的句子掩蔽者主要是信息性的；(2)不同频段的噪声掩蔽者是不同频段句子的对照；(3)同频段的噪声掩蔽者主要是能量掩蔽者。不同频段句子的空间释放量大于其他掩蔽者，但听障组的空间释放量(10分贝)小于听力正常组(15分贝)。对于听力受损的听众来说，这种较小的益处可以部分解释为掩蔽感水平。然而，结果表明，听力受损的听者可以利用空间分离的知觉效应，在主要是信息掩蔽的情况下改善语音识别。(C)2005年美国声学学会。
The ability to understand speech in a multi-source environment containing informational masking may depend on the perceptual arrangement of signal and masker objects in space. In normal-hearing listeners, Arbogast et al. [J. Acoust. Soc. Am. 112, 2086-2098 (2002)] found an 18-dB spatial release from a primarily informational masker, compared to 7 dB for a primarily energetic masker. This article extends the earlier work to include the study of listeners with sensorineural hearing loss. Listeners performed closed-set speech recognition in two spatial conditions: 0 degrees and 90 degrees separation between signal and masker. Three maskers were tested: (1) the different-band sentence masker was designed to be primarily informational; (2) the different-band noise masker was a control for the different-band sentence; and (3) the same-band noise masker was designed to be primarily energetic. The spatial release from the different-band sentence was larger than for the other maskers, but was smaller (10 dB) for the hearing-impaired group than for the normal-hearing group (15 dB). The smaller benefit for the hearing-impaired listeners can be partially explained by masker sensation level. However, the results suggest that hearing-impaired listeners can use the perceptual effect of spatial separation to improve speech recognition in the presence of a primarily informational masker. (c) 2005 Acoustical Society of America.