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Melodic Contour Identification and Music Perception by Cochlear Implant Users

机译：Cochlear植入物用户的旋律轮廓识别和音乐感知

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Research and outcomes with cochlear implants (CIs) have revealed a dichotomy in the cues necessary for speech and music recognition. CI devices typically transmit 16-22 spectral channels, each modulated slowly in time. This coarse representation provides enough information to support speech understanding in quiet and rhythmic perception in music, but not enough to support speech understanding in noise or melody recogni-tion. Melody recognition requires some capacity for complex pitch perception, which in turn depends strongly on access to spectral fine structure cues. Thus, temporal envelope cues are adequate for speech perception under optimal listening conditions, while spec-tral fine structure cues are needed for music perception. In this paper, we present recent experiments that directly measure CI users' melodic pitch perception using a melodic contour identification (MCI) task. While normal-hearing (NH) listeners' performance was consistently high across experiments, MCI performance was highly variable across CI users. CI users' MCI performance was significantly affected by instrument timbre, as well as by the presence of a competing instrument. In general, CI users had great dif-ficulty extracting melodic pitch from complex stimuli. However, musically experienced CI users often performed as well as NH listeners, and MCI training in less-experienced subjects greatly improved performance. With fixed constraints on spectral resolution, such as occurs with hearing loss or an auditory prosthesis, training and experience can provide considerable improvements in music perception and appreciation.
机译：与耳蜗植入物（CIS）的研究和结果揭示了言语和音乐识别所必需的提示中的二分法。 CI设备通常传输16-22个频谱通道，每个频谱通道在时间上缓慢调制。这种粗略表示提供了足够的信息，以在音乐中安静和有节奏的感知中支持语音理解，但不足以支持噪音或旋律识别的语音理解。旋律识别需要一些容量的复杂间距感知，这反过来依赖于对光谱细结构提示的访问。因此，在最佳听力条件下，颞包络线条足以进行语音感知，而音乐感知需要规格 - 特拉尔精细结构提示。在本文中，我们目前使用旋律轮廓识别（MCI）任务直接测量CI用户的旋律间距感知的实验。虽然正常听力（NH）听众的性能在实验中一直很高，但MCI性能在CI用户方面具有高度变化。 CI用户的MCI性能受到仪器TIMBRE的显着影响，以及通过竞争仪器的存在。通常，CI用户从复杂的刺激中提取旋律间距很大。然而，音乐会经验丰富的CI用户经常表现在NH侦听器中，而MCI培训在不经验丰富的科目中大大提高了性能。对于频谱分辨率的固定约束，例如用听力损失或听觉假体发生，培训和经验可以在音乐感知和欣赏方面提供相当大的改进。

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