Double-vowel perception in listeners with cochlear hearing loss: Differences in fundamental frequency, ear of presentation, and relative amplitude
Double-vowel perception in listeners with cochlear hearing loss: Differences in fundamental frequency, ear of presentation, and relative amplitude
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DOI：
10.1044/1092-4388(2005/017
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发表时间：
2005-02-01
影响因子：
2.6
通讯作者：
Swensson-Prutsman, J
中科院分区：
文献类型：
--
作者：
Arehart, KH;Rossi-Katz, J;Swensson-Prutsman, J
本研究提出了两个实验，调查是否与耳蜗听力损失（听力受损; HI）和听力正常（NH）的听众表现出不同的敏感性掩蔽在双元音识别。实验1探讨了双元音感知如何随着0和2个双元音的基频（Delta F-o）和组成元音的相对振幅（目标与掩蔽比：-10，-5，0，5，10 dB）的差异而变化。当Delta F-o为0时，听众处于HI。组中的听者通常只感知到1个元音的存在，而NH组中的听者通常感知到2个元音的存在。在这两组中，Delta F-o有利于目标元音识别，当目标与掩蔽比为-10 dB时，效果最好。当识别率的特定元音（在d）的等级排序，不同的模式的元音优势之间的NH和HI组。实验二比较了Delta F-o（0~A）对双元音单耳和双耳呈现的影响。两组均显示出显著的双耳分听获益。此外，个别听众在HI组表现出更大的双耳两分的好处的趋势。在这两个实验中，识别竞争元音显着更糟的HI听众。本研究的结果支持了这样一种观点，即对掩蔽的敏感性增加是听力损失的听者双元音感知退化的主要因素。
This study presents 2 experiments investigating whether listeners with cochlear hearing loss (hearing impaired; HI) and listeners with normal hearing (NH) show differential susceptibility to masking in double-vowel identification. Experiment 1 addressed how double-vowel perception changes as a function of differences in fundamental frequency (Delta F-o) of 0 and 2 semitones and the relative amplitudes of the constituent vowels (target-to-masker ratios: -10, -5, 0, 5, 10 dB). When Delta F-o is 0 semitones, listeners in the HI. group often perceive the presence of only 1 vowel, whereas listeners in the NH group generally perceive the presence of 2 vowels. In both groups, Delta F-o benefits target-vowel identification, with the greatest benefit occurring when the target-to-masker ratio is -10 dB. When identification rates of specific vowels (in d) were rank ordered, different patterns of vowel dominance were found between the NH and HI groups. In Experiment 2, the effects of Delta F-o, (0 to A semitones) were compared for monaural and dichotic presentation of double vowels. Both groups show significant dichotic benefit. In addition, individual listeners in the HI group showed trends toward greater dichotic benefit. In both experiments, identification of competing vowels was significantly worse in HI listeners. The results of this study support the idea that increased susceptibility to masking is a primary factor underlying the degraded double-vowel perception in, listeners with hearing loss.