Amplitude modulation processing and perception in dynamic, multisource listening environments

动态多源聆听环境中的幅度调制处理和感知

• 批准号: 10308957
• 负责人: Christopher Wood Conroy
• 金额: $ 4.6万
• 依托单位: BOSTON UNIVERSITY (CHARLES RIVER CAMPUS)
• 依托单位国家: 美国
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-06-01 至 2022-05-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/10308957
• 关键词: Acoustics; Address; Affect; Area; Auditory; Auditory Perception; Auditory Psychophysics; Behavioral; Boston; Cochlear Implants; Communication; Communication impairment; Cues; Data Analyses; Data Compression; Development; Diagnosis; Dimensions; Educational workshop; Environment; Exhibits; Fellowship; Frequencies; Generations; Goals; Hearing; Hearing Aids; Human; Individual; Individual Differences; Knowledge; Life; Light; Masks; Mediating; Methodology; Mission; National Institute on Deafness and Other Communication Disorders; Noise; Outcome; Outcome Measure; Output; Perception; Predisposition; Process; Psychophysics; Research; Research Personnel; Sensory; Series; Source; Speech; Speech Intelligibility; Stimulus; Strategic Planning; Structure; Students; Techniques; Testing; Time; Training; Uncertainty; Universities; Variant; Work; career; clinically relevant; digital; expectation; experimental study; hearing impairment; improved; innovation; insight; interest; normal hearing; novel; pre-doctoral; selective attention; sensory mechanism; sound; success; symposium; theories

PROJECT SUMMARY/ABSTRACT The relatively slow variations in amplitude across time (amplitude modulation or AM) inherent to many behaviorally relevant sounds are of fundamental importance to auditory perception and communication. This is true for listeners with normal hearing, listeners with hearing loss, and, in particular, for listeners with cochlear implants, for whom AM cues are the dominant source of auditory information in some settings. The broad goal of the work proposed here is to better understand how listener uncertainty and expectation affect AM processing and perception in dynamic, multisource listening environments. The work is structured under two specific aims. In Aim 1, a series of experiments using novel and innovative psychophysical techniques, which build upon and extend those used previously to characterize the effects of listener uncertainty and expectation in the context of auditory informational masking, are proposed in order to characterize how listener uncertainty and expectation affect the processing of AM. In Aim 2, further experiments using similar techniques are proposed to characterize individual differences in this area. While the focus in both cases is on listeners with normal hearing, the proposed experiments nevertheless may yield clinically relevant results. For example, the dynamic range compression algorithms common to many current-generation digital hearing aids can introduce rapid, unpredictable changes to the AM content of a scene, thereby inducing uncertainty in the listener. A better understanding of how listener uncertainty and expectation affect AM processing and perception in listeners with normal hearing, then, may yield insights into the factors that affect aided multisource listening. Moreover, given the importance of AM cues to listeners with cochlear implants, a better understanding of individual differences in this area may help to explain the large individual differences in outcome measures and communication successes exhibited by this listener group. Thus, the work proposed here is directly in line with NIDCD's mission and strategic plan of understanding normal auditory function so as to improve diagnosis, treatment, and communication outcomes for listeners with auditory communication disorders. The PI of this fellowship application is an advanced predoctoral student at Boston University, where the work will be conducted. A sponsorship team comprising world renowned experts in the field of auditory psychophysics has been assembled that will provide training to the applicant in the core areas of psychophysical theory, experimental techniques, and data analysis methodology. This training, together with supplemental coursework, attendance at various workshops, regular presentations at conferences, and an assortment of professional development activities, will prepare the applicant for the next stage of a productive career as an independent researcher in the field of auditory perception and communication.

项目总结/摘要 振幅在时间上的相对缓慢的变化（振幅调制或AM）是许多调制器固有的， 行为相关的声音对于听觉感知和交流具有根本的重要性。这是 对于听力正常的收听者、听力损失的收听者，特别是对于耳蜗的收听者， 在某些情况下，AM提示是听觉信息的主要来源。广泛的目标 这里提出的工作是更好地了解听者的不确定性和期望如何影响AM处理 以及在动态、多频域收听环境中的感知。这项工作是根据两个具体目标安排的。 在目标1中，一系列使用新颖和创新的心理物理学技术的实验，这些技术建立在 扩展那些以前用来描述听众的不确定性和期望的影响， 听觉信息掩蔽，提出了为了表征如何听者的不确定性和期望 影响AM的加工。在目标2中，提出了使用类似技术的进一步实验来表征 这方面的个体差异。虽然在这两种情况下的重点是听力正常的听众， 然而，实验可以产生临床相关的结果。例如，动态范围压缩 许多当前一代数字助听器的通用算法可能会引入快速、不可预测的变化 与场景的AM内容相关联，从而在听众中引起不确定性。更好地理解听众如何 不确定性和期望影响听力正常的听众的AM处理和感知，那么，可能 深入了解影响辅助多频听力的因素。此外，考虑到AM提示的重要性， 对于耳蜗植入者来说，更好地了解这一领域的个体差异可能有助于 解释结果测量和沟通成功表现出的巨大个体差异， 听众组。因此，这里提出的工作直接符合防治荒漠化全国联盟的使命和2010年战略计划。 了解正常的听觉功能，以改善诊断，治疗和沟通结果， 听觉交流障碍的听众。这个奖学金申请的PI是一个先进的博士预科 学生在波士顿大学，在那里的工作将进行。赞助团队由世界知名的 听觉心理物理学领域的专家已经聚集，将为申请人提供以下培训： 心理物理学理论，实验技术和数据分析方法的核心领域。这次培训， 加上补充课程，参加各种研讨会，定期在会议上发言， 以及各种专业发展活动，将为申请人下一阶段的 作为听觉感知和交流领域的独立研究人员，他的职业生涯卓有成效。