Binaural Spectral Integration with Hearing Loss and Hearing Devices

双耳频谱整合与听力损失和听力设备

• 批准号: 10170316
• 负责人: Lina A. Reiss
• 金额: $ 57.03万
• 依托单位: OREGON HEALTH & SCIENCE UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-12-01 至 2024-05-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/10170316
• 关键词: Action Potentials; Adult; Affect; Age; American; Auditory; Auditory Psychophysics; Bilateral; Binaural; Child; Childhood; Clinical; Cochlear Implants; Complex; Cues; Data; Development; Devices; Ear; Early Intervention; Electric Stimulation; Electrodes; Environment; Face; Frequencies; Future; Goals; Grant; Hearing; Hearing Aids; Implanted Electrodes; Individual; Measures; Modeling; Noise; Pattern; Performance; Peripheral; Play; Population; Rehabilitation therapy; Research; Resolution; Restaurants; Role; Severities; Sound Localization; Speech; Speech Perception; Stimulus; Stream; Testing; Training Programs; Voice; Weight; auditory processing; base; binaural hearing; clinically significant; early onset; experience; hearing impairment; human subject; improved; information processing; normal hearing; prevent; programs; sound; spectral distortion; speech in noise; speech recognition

Project Summary Approximately 22 million Americans have a hearing impairment. While hearing devices such as hearing aids (HAs) and cochlear implants (CIs) are successful in improving speech recognition for many hearing- impaired individuals, there is still significant variability in benefit, and speech recognition in noise remains a problem. One factor that may limit benefit, especially binaural benefit, is abnormal binaural spectral integration. A prerequisite for binaural integration is binaural fusion — the fusion of stimuli from the two ears into a single auditory object. Our findings from the previous grant showed that unlike normal-hearing (NH) listeners, many HA and CI users experience abnormally “broad” binaural fusion in the spectral domain, such that pitches that differ greatly in frequency between the two ears are still heard as a single percept. Individuals with broad fusion also experience abnormal binaural spectral integration - averaging and thus distortion of spectral information across the ears when disparate sounds are fused. We also showed broad fusion to be associated with binaural interference — poorer speech recognition with two ears compared to one. More importantly, preliminary data show that broad fusion is associated with greater difficulty with understanding speech in challenging multi-talker listening situations, such as noisy restaurants. Difficulties with speech understanding in noise is a major complaint of both HA and CI users. In order to help hearing-impaired listeners reduce binaural interference and improve speech understanding in background noise, we need to understand the underlying causes and factors in broad fusion. The long-term goal of this research program is to investigate the effects, causes, and potential treatments for abnormal binaural spectral integration in hearing-impaired listeners. In this proposal we will: 1) determine how broad binaural fusion affects speech perception in quiet and in background talkers; and 2) investigate potential causes of broad binaural fusion in children and adults with HAs and CIs, focusing on peripheral spectral resolution, auditory experience, and top-down auditory processing factors. The proposed research will indicate the role of broad binaural spectral fusion in difficulties faced by hearing-impaired listeners, especially for speech understanding in background noise. Determination of the factors underlying broad fusion will inform future rehabilitation approaches to treat broad fusion, and help hearing-impaired listeners attain the same benefits of binaural hearing as NH listeners.

项目概要 大约 2200 万美国人有听力障碍，而助听器等助听器则存在听力障碍。 辅助设备（HA）和人工耳蜗（CI）成功地改善了许多听力障碍者的语音识别能力。 受损个体的益处仍然存在显着差异，并且噪声中的语音识别仍然是一个 可能限制益处（尤其是双耳益处）的因素之一是异常的双耳频谱集成。 双耳融合的先决条件是双耳融合——将两只耳朵的刺激融合到一个耳朵中。 我们之前的研究结果表明，与正常听力（NH）的听众不同， 许多 HA 和 CI 用户在频谱域中体验到异常“广泛”的双耳融合，使得音调 两耳之间频率差异很大的声音仍然被视为单一感知。 融合也会经历异常的双耳频谱整合 - 平均，从而导致频谱失真 当不同的声音融合时，我们还发现了广泛的融合是相关的。 双耳干扰——两只耳朵的语音识别能力比一只耳朵的语音识别能力差。 更重要的是，初步数据表明，广泛的融合与更大的难度有关 在具有挑战性的多人听力环境中理解语音，例如嘈杂的餐厅。 噪音中的语音理解是 HA 和 CI 用户的主要抱怨。 听众减少双耳干扰并提高背景噪声中的语音理解，我们需要 了解广泛融合的根本原因和因素。 该研究计划的长期目标是调查影响、原因和潜在的治疗方法 针对听力受损听众的异常双耳频谱整合，在本提案中，我们将： 1) 确定。 广泛的双耳融合如何影响安静和背景说话者的言语感知；2) 调查； 患有 HA 和 CI 的儿童和成人广泛双耳融合的潜在原因，重点是外周 光谱分辨率、听觉体验和自上而下的听觉处理因素。 拟议的研究将表明广泛的双耳频谱融合在解决所面临的困难中的作用 听力受损的听众，特别是在背景噪音中的语音理解的测定。 广泛融合背后的因素将为未来治疗广泛融合的康复方法提供信息，并帮助 听力受损的听众可以获得与非听力障碍听众相同的双耳听力益处。