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: 8325734
• 负责人: Matthew J. Goupell
• 金额: $ 24.37万
• 依托单位: UNIV OF MARYLAND, COLLEGE PARK
• 依托单位国家: 美国
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-03 至 2014-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8325734
• 关键词: Acoustics; Area; Auditory; Auditory system; Automobile Driving; Basilar Membrane; Bilateral; Clinical; Cochlear Implants; Complex; Detection; Devices; Ear; Electric Stimulation; Electrodes; Environment; Future; Generations; Goals; Growth; Hearing; Hearing Impaired Persons; Individual; Loudness; Mentors; Methods; Noise; Perception; Phase; Process; Research; Scheme; Signal Transduction; Sound Localization; Speech; Stimulus; System; Time; Travel; Work; auditory stimulus; binaural hearing; design; implantation; novel; relating to nervous system; simulation; sound

The proposed research aims to combine the areas of speech understanding, binaural hearing, sound localization, and cochlear implants (CIs). The proposed research Is novel because it aims to understand the advantages, capabilities, and limitations of bilateral CIs under controlled multi-electrode stimulation and of more "realistic" auditory stiniuli that are modulated in time. Controlled multi-electrode stimulation research and research on binaural modulated stimuli has only started recently. Research on this topic Is a logical next |step in bilateral CI researx;h; moving to less controlled and more complex auditory stimuli. 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 Wealthy auditory system, and these differences alter important acoustic information enough to significantly diminish any binaural hearing advantage. These differences include, but are not limited to: interjaural tonotopic place mismatch, unequal interaural neural survival, varying loudness growth between indi\>idual electrodes and ears, channel interactions, partial or complete lack of interaural sound fusion, and lack;of travelling wave of an acoustic stimulus along the basilar membrane. Some of these limitations may be compensated by different processing schemes or changes to the physical devices. Other limitations are intrinsic to electrical stimulation and cannot be compensated with the current generation of CIs. The mentored phase of the proposed research focused on single-electrode binaural signal detection and sound localization. The independent phase of the proposed research will focus on multi-electrode binaural signal [detection, sound localization, and understanding speech in realistic listening environments. The ultimate aim is to provide a binaural advantage to bilateral CI users' ability to localize sounds and to understand speech in difficult listening environments, like noisy or reverberant rooms. This research has potential to guide the clinical implementation of a Unlfonn method of bilateral fitting of CIs.

拟议的研究旨在结合语音理解、双耳听力、声音等领域 定位和人工耳蜗 (CI)。拟议的研究是新颖的，因为它旨在了解 受控多电极刺激下双侧 CI 的优点、功能和局限性 及时调制的更“现实”的听觉刺激。受控多电极刺激研究 双耳调制刺激的研究最近才开始。对这个主题的研究是合乎逻辑的下一步 |双边 CI 研究的步骤；h；转向控制较少且更复杂的听觉刺激。这会有所帮助 提供对双边植入的一个重要优势的理解，即理解言语 嘈杂的环境。 推动这项工作的主要假设是当前的 CI 系统与 [丰富的听觉系统，这些差异足以改变重要的声学信息 显着削弱任何双耳听力优势。这些差异包括但不限于： 耳间音调位置不匹配、耳间神经存活不平等、耳间响度增长不同 单独的电极和耳朵、通道相互作用、部分或完全缺乏耳间声音融合，以及 沿基底膜缺乏声刺激的行波。其中一些限制可能是 通过不同的处理方案或物理设备的改变来补偿。其他限制是 这是电刺激固有的，不能用当前一代的 CI 来补偿。这 拟议研究的指导阶段重点关注单电极双耳信号检测和声音 本土化。拟议研究的独立阶段将重点关注多电极双耳信号 [在真实聆听环境中进行检测、声音定位和理解语音。最终目标 是为双边 CI 用户定位声音和理解语音的能力提供双耳优势 困难的聆听环境，例如嘈杂或混响的房间。这项研究有潜力指导 CI 双侧拟合 Unlfonn 方法的临床实施。