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The combined effects of reverberation and nonstationary noise on sentence intelligibility. | LitMetric

The combined effects of reverberation and nonstationary noise on sentence intelligibility.

J Acoust Soc Am

VU University Medical Center, ENT/Audiology, EMGO Institute, PO Box 7057, 1007 MB Amsterdam, The Netherlands.

Published: August 2008

Listening conditions in everyday life typically include a combination of reverberation and nonstationary background noise. It is well known that sentence intelligibility is adversely affected by these factors. To assess their combined effects, an approach is introduced which combines two methods of predicting speech intelligibility, the extended speech intelligibility index (ESII) and the speech transmission index. First, the effects of reverberation on nonstationary noise (i.e., reduction of masker modulations) and on speech modulations are evaluated separately. Subsequently, the ESII is applied to predict the speech reception threshold (SRT) in the masker with reduced modulations. To validate this approach, SRTs were measured for ten normal-hearing listeners, in various combinations of nonstationary noise and artificially created reverberation. After taking the characteristics of the speech corpus into account, results show that the approach accurately predicts SRTs in nonstationary noise and reverberation for normal-hearing listeners. Furthermore, it is shown that, when reverberation is present, the benefit from masker fluctuations may be substantially reduced.

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http://dx.doi.org/10.1121/1.2945153DOI Listing

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