Speech intelligibility prediction in reverberation

towards an integrated model of speech transmission, spatial unmasking, and binaural de-reverberation

Thibaud Leclère*, Mathieu Lavandier, John F. Culling

*Corresponding author for this work

Research output: Contribution to journalArticle

10 Citations (Scopus)


Room acoustic indicators of intelligibility have focused on the effects of temporal smearing of speech by reverberation and masking by diffuse ambient noise. In the presence of a discrete noise source, these indicators neglect the binaural listener's ability to separate target speech from noise. Lavandier and Culling [(2010). J. Acoust. Soc. Am. 127, 387-399] proposed a model that incorporates this ability but neglects the temporal smearing of speech, so that predictions hold for near-field targets. An extended model based on useful-to-detrimental (U/D) ratios is presented here that accounts for temporal smearing, spatial unmasking, and binaural de-reverberation in reverberant environments. The influence of the model parameters was tested by comparing the model predictions with speech reception thresholds measured in three experiments from the literature. Accurate predictions were obtained by adjusting the parameters to each room. Room-independent parameters did not lead to similar performances, suggesting that a single U/D model cannot be generalized to any room. Despite this limitation, the model framework allows to propose a unified interpretation of spatial unmasking, temporal smearing, and binaural de-reverberation.

Original languageEnglish
Pages (from-to)3335-3345
Number of pages11
JournalJournal of the Acoustical Society of America
Issue number6
Publication statusPublished - Jun 2015
Externally publishedYes

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