Speech intelligibility enhancement using hearing-aid array processing
Speech intelligibility enhancement using hearing-aid array processing
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DOI：
10.1121/1.420107
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发表时间：
1997-09-01
影响因子：
2.4
通讯作者：
Kates, JM
中科院分区：
文献类型：
--
作者：
Saunders, GH;Kates, JM
麦克风阵列可以通过抑制来自期望信号方向以外的干扰来改善听力受损的收听者在噪声中的语音识别。凯特和M. R.韦斯，J. Acoust.秒Am. 99，3138-3148（1996）]，在两个房间中使用AI加权阵列增益作为性能度量来评估几种阵列处理技术。该阵列由五个全向麦克风具有均匀的2.5厘米的间距，在端射方向取向。在本文中，两个阵列处理技术，延迟和总和波束形成和超定向处理，语音清晰度评估一组听力受损的科目。语音清晰度测量使用语音接收阈值（SRT）的担保人和语音清晰度等级（SIR）的句子材料。阵列性能进行了比较，为一个单一的全向麦克风和一个单一的定向麦克风具有心形响应模式。SRT和SIR结果表明，超定向阵列处理是最有效的，其次是心形麦克风，阵列使用延迟和波束形成，和单全向麦克风。相对处理评级似乎没有受到强烈的影响，由房间的大小，和SRT值确定使用孤立的spondees是类似的SIR值从连续的话语。(C)1997年美国声学学会。
Microphone arrays can improve speech recognition in noise for hearing-impaired listeners by suppressing interference coming from other than the desired signal direction, In a previous paper [J. M. Kates and M. R. Weiss, J. Acoust. Sec. Am. 99, 3138-3148 (1996)], several array-processing techniques were evaluated in two rooms using the AI-weighted array gain as the performance metric. The array consisted of five omnidirectional microphones having uniform 2.5-cm spacing, oriented in the endfire direction. In this paper, the speech intelligibility for two of the array processing techniques, delay-and-sum beamforming and superdirective processing, is evaluated for a group of hearing-impaired subjects. Speech intelligibility was measured using the speech reception threshold (SRT) for spondees and speech intelligibility rating (SIR) for sentence materials. The array performance is compared with that for a single omnidirectional microphone and a single directional microphone having a cardioid response pattern. The SRT and SIR results show that the superdirective array processing was the most effective, followed by the cardioid microphone, the array using delay-and-sum beamforming, and the single omnidirectional microphone. The relative processing ratings do not appear to be strongly affected by the size of the room, and the SRT values determined using isolated spondees are similar to the SIR values produced from continuous discourse. (C) 1997 Acoustical Society of America.