Informational masking in young and elderly listeners for speech masked by simultaneous speech and noise

被引:56
作者
Agus, Trevor R. [1 ,2 ,3 ,4 ]
Akeroyd, Michael A. [1 ]
Gatehouse, Stuart [1 ]
Warden, David [2 ]
机构
[1] Glasgow Royal Infirm, Scottish Sect, MRC Inst Hearing Res, Glasgow G31 2ER, Lanark, Scotland
[2] Univ Strathclyde, Dept Psychol, Glasgow G1 1QE, Lanark, Scotland
[3] Univ Paris 05, CNRS, F-75005 Paris, France
[4] Ecole Normale Super, F-75005 Paris, France
基金
英国医学研究理事会;
关键词
PERCEIVED SPATIAL SEPARATION; ENERGETIC MASKING; MULTIPLE MASKERS; COMPETING SPEECH; RELEASE; PERCEPTION; HEARING; RECOGNITION; RECEPTION;
D O I
10.1121/1.3205403
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
Three experiments measured the effects of age on informational masking of speech by competing speech. The experiments were designed to minimize the energetic contributions of the competing speech so that informational masking could be measured with no large corrections for energetic masking. Experiment 1 used a "speech-in-speech-in-noise" design, in Which the competing speech was presented in noise at a signal-to-noise ratio (SNR) of -4 dB. This ensured that the noise primarily contributed the energetic masking but the competing speech contributed the informational masking. Equal amounts of informational masking (3 dB) were observed for young and elderly listeners, although less was found for hearing-impaired listeners. Experiment 2 tested a range of SNRs in this design and showed that informational masking increased with SNR up to about an SNR of -4 dB, but decreased thereafter. Experiment 3 further reduced the energetic contribution of the competing speech by filtering it into different frequency bands from the target speech. The elderly listeners again showed approximately the same amount of informational masking (4-5 dB), although some elderly listeners had particular difficulty understanding these stimuli in any condition. On the whole, these results suggest that young and elderly listeners were equally susceptible to informational masking. (C) 2009 Acoustical Society of America. [DOI: 10.1121/1.3205403]
引用
收藏
页码:1926 / 1940
页数:15
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