Speech understanding and signal detection in noise in bilateral cochlear implants

双侧人工耳蜗噪声中的语音理解和信号检测

• 批准号: 7712963
• 负责人: Matthew J. Goupell
• 金额: $ 9.02万
• 依托单位: UNIVERSITY OF WISCONSIN-MADISON
• 依托单位国家: 美国
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-11 至 2011-07-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7712963
• 关键词: Acoustics; Address; Area; Auditory system; Automobile Driving; Basilar Membrane; Bilateral; Bypass; Characteristics; Clinical; Cochlea; Cochlear Implants; Complex; Cues; Data; Detection; Ear; Electric Stimulation; Electrodes; Environment; Frequencies; Future; Generations; Goals; Hearing; Hearing Impaired Persons; Individual; Intrinsic factor; Just-Noticeable Differences; Knowledge; Life; Masks; Measurement; Measures; Mentors; Methods; Michigan; Modeling; Nature; Noise; Perception; Performance; Phase; Postdoctoral Fellow; Principal Investigator; Process; Pulse Rates; Research; Role; Scheme; Shapes; Signal Transduction; Sound Localization; Speech; Speech Intelligibility; Stimulus; Structure; System; Testing; Time; Universities; Work; binaural hearing; design; external ear auricle; implantation; novel; research study

DESCRIPTION (provided by applicant): The applicant's current research involves speech understanding and sound localization for unilateral and bilateral cochlear-implant (CI) users. Specifically, the applicant studies the inclusion and detection of pinna cues for median-sagittal-plane sound localization in CI users. It involves speech understanding experiments, experiments with direct multi-electrode stimulation, and sound localization experiments. The applicant also continues to work on dynamic binaural phenomena, which was his dissertation topic at Michigan State University. Dynamic binaural phenomena are related to understanding speech in difficult listening conditions, like reverberant or noisy rooms. The proposed research will be a natural continuation of the post-doc and dissertation research areas. It aims to combine the areas of speech understanding, binaural hearing, sound localization, and cochlear implants. The proposed research is novel because it aims to understand the advantages, capabilities, and limitations of bilateral CIs under controlled multi-electrode stimulation. Controlled multi-electrode stimulation research has only started recently; much of this research is being performed at the sponsor's lab. Research on this topic is a logical next step in bilateral CI research; it would help provide understanding of an important advantage of bilateral implantation, that of understanding speech in noisy environments. The main hypothesis driving this work is that current CI systems introduce fundamental differences from the healthy auditory system, and these differences alter important acoustic information enough to significantly diminish any binaural hearing advantage. Some of these limitations may be compensated by different processing schemes, while others are intrinsic to electrical stimulation and cannot be compensated with the current generation of CIs. The mentored phase of the proposed research will focus on single- electrode binaural signal detection. The independent phase of the proposed research will focus on multi- electrode binaural signal detection and speech understanding in realistic listening environments. The ultimate aim is to provide a binaural advantage to bilateral CI users' speech understanding. RELEVANCE: The main goal in the field of cochlear implants is to provide better speech understanding for profoundly deaf individuals. A major research question in this field is hearing with two ears. The proposed work will systematically examine factors that may cause a difference in acoustic perception between cochlear-implant and normal-hearing listeners. These studies will guide the design of future cochlear implants.

描述（由申请人提供）：申请人的当前研究涉及单方面和双侧耳蜗（CI）用户的语音理解和声音定位。具体而言，申请人研究了CI使用者中位数平面声音定位的PINNA提示的包含和检测。它涉及语音理解实验，直接多电极刺激的实验以及声音定位实验。申请人还继续致力于动态双耳现象，这是他在密歇根州立大学的论文主题。动态双耳现象与理解在艰难的听力条件下的言语有关，例如混响或嘈杂的房间。拟议的研究将是博士后和论文研究领域的自然延续。它旨在结合言语理解，双耳听力，声音定位和人工耳蜗的领域。拟议的研究之所以新颖，是因为它旨在了解受控的多电极刺激下双侧CI的优势，能力和局限性。受控的多电极刺激研究直到最近才开始。这项研究的大部分是在赞助商实验室进行的。关于该主题的研究是双边CI研究的逻辑下一步。这将有助于理解双边植入的重要优势，即在嘈杂的环境中理解语音。推动这项工作的主要假设是当前的CI系统引入了与健康听觉系统的根本差异，而这些差异会改变重要的声学信息，足以显着降低任何双耳听力优势。这些局限性中的一些可以通过不同的处理方案来补偿，而其他局限性则是电刺激的固有的，不能用当前的CI来补偿。拟议的研究的指导阶段将重点放在单电极双耳信号检测上。拟议研究的独立阶段将重点放在现实听力环境中的多电极双耳信号检测和语音理解上。最终目的是为双边CI用户的语音理解提供双耳优势。相关性：人工耳蜗领域的主要目标是为深深的聋人提供更好的语音理解。该领域的一个主要研究问题是有两只耳朵。拟议的工作将系统地检查可能导致人工耳蜗和正常听众之间声学差异的因素。这些研究将指导未来人工耳蜗的设计。