Speech recognition with cochlear implants as a function of the number of channels: Effects of electrode placement
Speech recognition with cochlear implants as a function of the number of channels: Effects of electrode placement
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DOI：
10.1121/10.0001316
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发表时间：
2020-05-01
影响因子：
2.4
通讯作者：
Gifford, Rene H.
中科院分区：
文献类型：
--
作者：
Berg, Katelyn A.;Noble, Jack H.;Gifford, Rene H.
本研究调查了人工耳蜗 (CI) 电极阵列类型和标量位置对 CI 接受者可用的通道数量的影响，以实现最大程度的语音理解和声音质量。 18 名舌后聋成年 CI 接受者参与其中，其中 11 名接受者采用完全位于鼓阶的直电极阵列，7 名接受者采用易位预弯曲电极阵列。使用计算机断层扫描来确定电极放置和标量位置。在每种情况下，通道数量从 4 到 22 不等，并且在阵列中空间分布相等。语音识别（单音节、安静和噪声中的句子）、主观语音质量和封闭式听觉任务（元音、辅音和频谱调制检测）都得到了敏锐的测量。具有放置良好的直电极阵列和易位的预弯曲电极阵列的接收者表现相似，展示了 8-10 个通道的渐近语音识别分数，与经典文献一致。这一发现与最近的研究形成鲜明对比 [Berg、Noble、Dawant、Dwyer、Labadie 和 Gifford。 （2019）。 J.阿库斯特。苏克。是。 145, 1556-1564]发现预弯曲电极阵列放置在鼓阶中，表现出超过 8-10 个通道的持续性能增益。鉴于这些结果，理论上直电极阵列和易位预弯曲电极阵列的通道独立性较低，因为它们放置在远离神经目标的位置。
This study investigated the effects of cochlear implant (CI) electrode array type and scalar location on the number of channels available to CI recipients for maximum speech understanding and sound quality. Eighteen post-lingually deafened adult CI recipients participated, including 11 recipients with straight electrode arrays entirely in scala tympani and 7 recipients with translocated precurved electrode arrays. Computerized tomography was used to determine electrode placement and scalar location. In each condition, the number of channels varied from 4 to 22 with equal spatial distribution across the array. Speech recognition (monosyllables, sentences in quiet and in noise), subjective speech sound quality, and closed-set auditory tasks (vowels, consonants, and spectral modulation detection) were measured acutely. Recipients with well-placed straight electrode arrays and translocated precurved electrode arrays performed similarly, demonstrating asymptotic speech recognition scores with 8-10 channels, consistent with the classic literature. This finding contrasts with recent work [Berg, Noble, Dawant, Dwyer, Labadie, and Gifford. (2019). J. Acoust. Soc. Am. 145, 1556-1564] that found precurved electrode arrays well-placed in scala tympani demonstrate continuous performance gains beyond 8-10 channels. Given these results, straight and translocated precurved electrode arrays are theorized to have less channel independence secondary to their placement farther away from neural targets.