Perceptual effects of mixed channel configurations in cochlear implants

人工耳蜗中混合通道配置的感知效果

• 批准号: 7575594
• 负责人: Bomjun Joshua Kwon
• 金额: $ 7.05万
• 依托单位: UNIVERSITY OF UTAH
• 依托单位国家: 美国
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-12-10 至 2009-07-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7575594
• 关键词: Auditory; Auditory Psychophysics; Clinical; Cochlear Implants; Devices; Electrodes; Evaluation; Future; Genetic Programming; Goals; Hearing; Hearing Impaired Persons; Implanted Electrodes; Lead; Maps; Measures; Methods; Modification; Patients; Pattern; Process; Psychophysics; Relative (related person); Research; Source; Speech Sound; Stream; System; Voice; Width; implantable device; improved; public health relevance; research study; segregation; sound; speech processing; speech recognition

DESCRIPTION (provided by applicant): The long-term goal of the proposed research is to better understand the perceptual effects of electrode configuration in cochlear implants (CIs). Various electrode configurations (i.e., stimulation modes) are possible in CI devices, e.g., monopolar (MP), bipolar (BP), etc. Currently, a fixed stimulation mode (commonly MP) is used for clinical fitting. Preliminary studies show that different stimulation modes can elicit distinct sound percepts, possibly due to the differences in the spread of excitation, suggesting that perceptual spectral patterns provided by MP or BP modes may be quite different. Combined MP and BP stimulation (i.e., "combined-mode") may provide an advantage over a fixed, single stimulation mode by providing information that is not available in an MP-only mode. In the proposed study, we will examine whether a combined-mode processor can improve CI users' speech recognition (effects of extended practice with the new map will also be studied), and determine if sound source segregation is improved with combined-mode presentation (in the context of psychophysics and multiple speech sounds). In addition, pitch relations between MP and BP stimulation will be objectively assessed in an auditory stream segregation experiment. Taken together, the results of the proposed experiments may lead to improved speech processing strategies without requiring substantial modifications to current systems, as combined-mode processors may provide a greater number of perceptual channels within the fixed number of implanted electrodes, and thus greatly benefit both current and future CI users. Taken together, the results of the proposed experiments could lead to improved hearing in CI users without requiring substantial modifications to current systems and benefit both current and future CI users. PUBLIC HEALTH RELEVANCE: The proposed study examines how deaf patients who have received cochlear implants perceptually organize one sound or multiple sounds with the electrical currents from the device. By investigating a new method of constructing current channels in a cochlear implant system that facilitates a good hearing and understanding of sounds, more benefits from the device will be expected in the future.

描述（由申请人提供）：拟议研究的长期目标是更好地了解人工耳蜗（CI）中电极配置的感知效应。各种电极配置（即，刺激模式）在CI设备中是可能的，例如，单极（MP）、双极（BP）等。目前，固定刺激模式（通常为MP）用于临床拟合。初步的研究表明，不同的刺激模式可以引起不同的声音感知，可能是由于兴奋的传播的差异，这表明MP或BP模式提供的感知频谱模式可能是完全不同的。组合MP和BP刺激（即，在一个实施例中，通过提供在仅MP模式中不可用的信息，刺激模式（例如，“组合模式”）可以提供优于固定的单一刺激模式的优点。在拟议的研究中，我们将研究组合模式处理器是否可以提高CI用户的语音识别（扩展实践与新地图的效果也将进行研究），并确定是否声源分离与组合模式演示（在心理物理学和多种语音的背景下）得到改善。此外，MP和BP刺激之间的音高关系将在听觉流分离实验中进行客观评估。综上所述，所提出的实验的结果可以导致改进的语音处理策略，而不需要对当前系统进行实质性修改，因为组合模式处理器可以在固定数量的植入电极内提供更多数量的感知通道，从而极大地有益于当前和未来的CI用户。总之，所提出的实验的结果可以导致改善CI用户的听力，而不需要对当前系统进行实质性修改，并且使当前和未来的CI用户受益。 公共卫生相关性：这项拟议中的研究将考察接受人工耳蜗植入的失聪患者如何利用来自该设备的电流感知组织一种声音或多种声音。通过研究一种在人工耳蜗系统中构建电流通道的新方法，该方法有助于良好的听力和对声音的理解，预计未来该设备将带来更多益处。