Abstract
A binaural model is proposed to predict the effect of audibility on speech reception thresholds (SRTs) measured in the presence of two (unintelligible) vocoded-speech maskers which were either (artificially) spatially separated or co-located with the frontal speech target. Comparing these two configurations allowed to evaluate a spatial release from masking (SRM) which was based here primarily on better-ear glimpsing. Audibility was varied by testing four sound levels for the combined maskers (while the target level was varied relative to these reference levels to measure the SRTs). The proposed model is based on a short-term binaural speech intelligibility model described by Collin & Lavandier [J. Acoust. Soc. Am. 134, 1146-1159 (2013)] and takes the calibrated target and masker signals (independently) at each ear as inputs along with the listener hearing thresholds in order to calculate a binaural “effective” signal-to-noise ratio. Differences in ratio across conditions can be directly compared to diffe...
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