通道相互作用限制了模拟人工耳蜗中的旋律音高感知。
Channel interaction limits melodic pitch perception in simulated cochlear implants.
机构信息
Department of Biomedical Engineering, University of Southern California, Los Angeles, California 90089, USA.
出版信息
J Acoust Soc Am. 2012 Nov;132(5):EL429-35. doi: 10.1121/1.4758770.
Abstract
In cochlear implants (CIs), melodic pitch perception is limited by the spectral resolution, which in turn is limited by the number of spectral channels as well as interactions between adjacent channels. This study investigated the effect of channel interaction on melodic contour identification (MCI) in normal-hearing subjects listening to novel 16-channel sinewave vocoders that simulated channel interaction in CI signal processing. MCI performance worsened as the degree of channel interaction increased. Although greater numbers of spectral channels may be beneficial to melodic pitch perception, the present data suggest that it is also important to improve independence among spectral channels.
摘要
在人工耳蜗（CI）中，旋律音高感知受到频谱分辨率的限制，而频谱分辨率又受到频谱通道数量以及相邻通道之间相互作用的限制。本研究通过使用模拟 CI 信号处理中通道相互作用的新型 16 通道正弦波声码器，调查了通道相互作用对正常听力受试者旋律轮廓识别（MCI）的影响。随着通道相互作用程度的增加，MCI 性能会恶化。尽管更多的频谱通道可能有利于旋律音高感知，但目前的数据表明，提高频谱通道之间的独立性也很重要。
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