ACOUSTIC SIMULATIONS COCHLEAR IMPLANTS TONAL LANGUAGE

声学模拟人工耳蜗声调语言

• 批准号: 6294484
• 负责人: LI XU
• 金额: $ 3.27万
• 依托单位: UNIVERSITY OF MICHIGAN AT ANN ARBOR
• 依托单位国家: 美国
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-06-01 至
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/6294484
• 关键词: auditory discrimination; cochlear implants; electrophysiology; human subject; neural information processing; nonEnglish language; postdoctoral investigator; psychoacoustics; sound perception; speech

Thousands of deaf people have benefitted from cochlear implantation. Yet, there is still a great need for continuing research to improve the performance of the cochlear implants so that as many patients as possible may receive maximum benefit. When speech signals are processed in a similar manner to the speech processors of the cochlear implants and the outputs are presented to normal-hearing subjects via loudspeakers, we can simulate the hearing with the cochlear implants. The proposed study is to use acoustic simulations of cochlear implants to study features of implant stimulation that are important for speech perception. Those features include number of electrodes, electrode location, low-pass cut- off frequencies for extracting signal envelopes, simulated insertion depth and spread of excitation, and speech-processing strategies. The proposed study will also define temporal and spectral features of implant stimulation that are important for a tonal language (specifically Mandarin Chinese). A tonal language differs from English in that the pitch or tonality of a monosyllable word conveys lexical meanings. Normal-hearing subjects will be required to perform speech discrimination and recognition tasks on processed speech signals. The understanding of stimulus features important for cochlear implants is essential to designs of future cochlear implants and to clinical fitting of cochlear implants. Our knowledge on how to process important speech feature such as tones for cochlear implants will lead to the development of cochlear implants for tonal languages and thus benefit millions of deaf people around the world.

数以千计的聋哑人从人工耳蜗植入中受益。然而，仍然非常需要继续研究以提高人工耳蜗的性能，以便尽可能多的患者可以获得最大的益处。当语音信号以与人工耳蜗的语音处理器类似的方式处理并通过扬声器将输出呈现给正常听力受试者时，我们可以模拟人工耳蜗的听力。拟议的研究是利用人工耳蜗植入物的声学模拟来研究对语音感知很重要的植入物刺激特征。这些功能包括电极数量、电极位置、用于提取信号包络的低通截止频率、模拟插入深度和激励传播以及语音处理策略。拟议的研究还将定义对于声调语言（特别是普通话）很重要的植入物刺激的时间和频谱特征。声调语言与英语的不同之处在于，单音节词的音高或声调传达词汇含义。听力正常的受试者将需要对处理后的语音信号执行语音辨别和识别任务。了解对人工耳蜗重要的刺激特征对于未来人工耳蜗的设计和人工耳蜗的临床验配至关重要。我们对如何处理重要语音特征（例如人工耳蜗的音调）的了解将促进声调语言人工耳蜗的开发，从而使世界各地数百万聋人受益。