Lentz Jennifer J, Valentine Susie
Department of Speech and Hearing Sciences, Indiana University, Bloomington, Indiana 47405, USA
J Acoust Soc Am. 2015 Sep;138(3):EL205-11. doi: 10.1121/1.4929624.
Two experiments tested the influence of hearing impairment (HI) on representing across-frequency temporal coherence. In one experiment, HI listeners demonstrated similar abilities to normal-hearing listeners in detecting across-frequency differences in modulation phase. In another, spectral-shape discrimination was detrimentally affected by modulation phase disparities imposed on spectral components. Spectral-shape discrimination by HI listeners was less influenced by the disparities, suggesting that hearing loss alters the representation of envelope phase. Results suggest that multiple approaches may be necessary to determine alterations associated with hearing loss—detection tasks may not be sufficient to elucidate distortions to temporal envelope associated with hearing loss.
两项实验测试了听力障碍（HI）对跨频率时间相干性表征的影响。在一项实验中，听力障碍的听众在检测调制相位的跨频率差异方面表现出与听力正常的听众相似的能力。在另一项实验中，频谱形状辨别受到施加在频谱成分上的调制相位差异的不利影响。听力障碍听众的频谱形状辨别受这些差异的影响较小，这表明听力损失会改变包络相位的表征。结果表明，可能需要多种方法来确定与听力损失相关的变化——检测任务可能不足以阐明与听力损失相关的时间包络失真。
