Effect of relative masker levels on speech recognition in two-talker maskers with varying perceptual similarity to the target speech.

Speech recognition thresholds were measured as a function of the relative level between two speech maskers that differed in perceptual similarity from the target. Results showed that recognition thresholds were driven by the relative level between the target and perceptually similar masker when the perceptually similar masker was softer, and by the relative level between the target and both maskers when the perceptually similar masker was louder. This suggests that effectiveness of a two-talker masker is primarily determined by the masker stream that is most perceptually similar to the target, but also by the relative levels between the two maskers.

语音识别阈值是根据与目标在感知相似性上不同的两个语音掩蔽声之间的相对水平来测量的。结果表明，当感知相似的掩蔽声较小时，识别阈值由目标和感知相似掩蔽声之间的相对水平决定；当感知相似的掩蔽声较大时，识别阈值由目标与两个掩蔽声之间的相对水平决定。这表明双说话者掩蔽声的效果主要由与目标在感知上最相似的掩蔽声流决定，但也由两个掩蔽声之间的相对水平决定。