Speech recognition in noise for cochlear implant listeners: Benefits of residual acoustic hearing
Speech recognition in noise for cochlear implant listeners: Benefits of residual acoustic hearing
复制标题
DOI：
10.1121/1.1687425
复制
发表时间：
2004-04-01
影响因子：
2.4
通讯作者：
Henry, BA
中科院分区：
文献类型：
--
作者：
Turner, CW;Gantz, BJ;Henry, BA
本研究的目的是探讨人工耳蜗植入患者保留低频听觉的潜在优势，包括理论和应用。提出了几个假设，预测残留的低频声学听力沿着高频电刺激将提供优于传统长电极人工耳蜗植入物的优势，用于在竞争背景中识别语音。在正常听力受试者中的模拟实验表明，在其他谈话者的背景中保留低频残余声学听力用于语音识别具有明显的优势，但在稳定的噪声中则不然。三个主题与植入“短电极”人工耳蜗植入和保存低频听觉也进行了测试，在相同的竞争背景下的语音识别，并比较了一个更大的群体的传统人工耳蜗植入用户。三个短电极主体中的每一个都比任何传统的长电极植入主体在其他谈话者的背景下进行语音识别表现得更好，但在稳定的噪声中，与模拟研究基本一致。当与一个根据安静时的语音识别能力匹配的传统植入用户亚组相比时，短电极患者在多人背景中显示出9 dB的优势。这些实验为人工耳蜗植入患者保留残余低频听觉提供了有力的初步支持。研究结果与这样一种观点相一致，即对音高的更好感知有助于在其他说话者的背景下区分声音，这是造成这种优势的原因。(C)2004年，美国声学学会。
The purpose of this study was to explore the potential advantages, both theoretical and applied, of preserving low-frequency acoustic hearing in cochlear implant patients. Several hypotheses are presented that predict that residual low-frequency acoustic hearing along with electric stimulation for high frequencies will provide an advantage over traditional long-electrode cochlear implants for the recognition of speech in competing backgrounds. A simulation experiment in normal-hearing subjects demonstrated a clear advantage for preserving low-frequency residual acoustic hearing for speech recognition in a background of other talkers, but not in steady noise. Three subjects with an implanted "short-electrode" cochlear implant and preserved low-frequency acoustic hearing were also tested on speech recognition in the same competing backgrounds and compared to a larger group of traditional cochlear implant users. Each of the three short-electrode subjects performed better than any of the traditional long-electrode implant subjects for speech recognition in a background of other talkers, but not in steady noise, in general agreement with the simulation studies. When compared to a subgroup of traditional implant users matched according to speech recognition ability in quiet, the short-electrode patients showed a 9-dB advantage in the multitalker background. These experiments provide strong preliminary support for retaining residual low-frequency acoustic hearing in cochlear implant patients. The results are consistent with the idea that better perception of voice pitch, which can aid in separating voices in a background of other talkers, was responsible for this advantage. (C) 2004 Acoustical Society of America.