Psychology Department, University of Wisconsin-Milwaukee, P.O. Box 413, Milwaukee, Wisconsin 53201, USA.
J Acoust Soc Am. 2013 Jul;134(1):EL119-25. doi: 10.1121/1.4807861.
Three experiments examined the intelligibility enhancement produced when noise bands flank high intensity narrowband speech. Enhancement was unaffected by noise gating (experiment 1), ruling out peripheral adaptation as a source, and was also unaffected by interaural decorrelation of noise bands flanking diotic speech (experiment 2), indicating that enhancement occurs prior to binaural processing. These results support previous suggestions that intelligibility loss at high intensities is reduced by lateral inhibition in the cochlear nuclei. Results from a final experiment suggest that this effect is only ipsilateral, implicating a specific population of inhibitory neurons.
三项实验研究了噪声带在高强度窄带语音两侧时产生的可懂度增强。噪声门控（实验 1）对增强没有影响，排除了外围适应作为源，同时噪声带在对侧语音两侧的耳间去相关（实验 2）也对增强没有影响，表明增强发生在双耳处理之前。这些结果支持了先前的建议，即高强度下的可懂度损失通过耳蜗核中的侧抑制来减少。最后一项实验的结果表明，这种效应仅在同侧，暗示了特定的抑制神经元群体。
