Sequential auditory grouping reduces binaural pitch fusion in listeners with normal hearing, hearing aids, and cochlear implantsa).

IF 2.1 2区 物理与天体物理 Q2 ACOUSTICS
Yonghee Oh, Nicole Dean, Frederick J Gallun, Lina A J Reiss
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引用次数: 0

Abstract

Binaural pitch fusion, the perceptual integration of dichotically presented stimuli that evoke different pitches, can be considered a type of simultaneous grouping. Hence, auditory streaming cues such as temporally flanking stimuli that promote sequential grouping might compete with simultaneous dichotic grouping to reduce binaural fusion. Here, we measured binaural pitch fusion using an auditory streaming task in normal-hearing listeners and hearing-impaired listeners with hearing aids and/or cochlear implants. Fusion ranges, the frequency or electrode ranges over which binaural pitch fusion occurs, were measured in a streaming paradigm using 10 alterations of a dichotic reference/comparison stimulus with a diotic capture stimulus, with fusion indicated by perception of a single stream. Stimuli were pure tones or electric pulse trains depending on the hearing device, with frequency or electrode varied across trials for comparison stimuli. Fusion ranges were also measured for the corresponding isolated stimulus conditions with the same stimulus durations. For all groups, fusion ranges decreased by up to three times in the streaming paradigm compared to the corresponding isolated stimulus paradigm. Hearing-impaired listeners showed greater reductions in fusion than normal-hearing listeners. The findings add further evidence that binaural pitch fusion is moderated by central processes involved in auditory grouping or segregation.

顺序听觉分组可减少听力正常、佩戴助听器和人工耳蜗的听者的双耳音高融合a)。
双耳音调融合是指对唤起不同音调的二分刺激的知觉整合,可被视为同时分组的一种类型。因此,听觉流线索(如促进顺序分组的时间侧翼刺激)可能会与同时二分法分组竞争,从而减少双耳融合。在此,我们使用听觉流任务测量了正常听力听众和佩戴助听器和/或人工耳蜗的听力受损听众的双耳音高融合。融合范围是指发生双耳音调融合的频率或电极范围,我们在流范式中使用二分参考/比较刺激与二分捕获刺激的 10 次变化来测量融合范围,并以感知单个流来表示融合。根据听力设备的不同,刺激物为纯音或电脉冲,对比刺激物的频率或电极在不同试验中有所不同。在刺激持续时间相同的相应孤立刺激条件下,也测量了融合范围。与相应的孤立刺激范式相比,所有组别的融合范围在串流范式中最多减少三倍。与听力正常的听者相比,听力受损的听者的融合度下降幅度更大。这些发现进一步证明,双耳音高融合受听觉分组或分离的中枢过程的调节。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
4.60
自引率
16.70%
发文量
1433
审稿时长
4.7 months
期刊介绍: Since 1929 The Journal of the Acoustical Society of America has been the leading source of theoretical and experimental research results in the broad interdisciplinary study of sound. Subject coverage includes: linear and nonlinear acoustics; aeroacoustics, underwater sound and acoustical oceanography; ultrasonics and quantum acoustics; architectural and structural acoustics and vibration; speech, music and noise; psychology and physiology of hearing; engineering acoustics, transduction; bioacoustics, animal bioacoustics.
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