Spectral Profile Cues and Synthetic Listening

频谱轮廓提示和综合听力

• 批准号: 7028007
• 负责人: Emily Buss
• 金额: $ 18.25万
• 依托单位: UNIV OF NORTH CAROLINA CHAPEL HILL
• 依托单位国家: 美国
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-12-15 至 2010-11-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7028007
• 关键词: auditory discrimination; auditory stimulus; auditory threshold; behavioral /social science research tag; clinical research; cues; hearing; human subject; model design /development; neural information processing; psychoacoustics; psychological models; sound frequency; statistics /biometry; time resolved data

DESCRIPTION (provided by applicant): In recent years there has been a growing body of psychoacoustical evidence demonstrating that stimulus components falling outside of the frequency region of a signal can have a significant effect on the processing of that signal. In profile analysis and in comodulation masking release (CMR) that effect is to decrease thresholds: the presence of flanking stimulus components tends to improve sensitivity. In other phenomena, such as across channel masking, the effect of flanking components is to elevate thresholds. The goal of the current project is to develop a model of across-channel processing that captures both facilitation and interference effects. This model is based on the premise that the most ecologically relevant characteristic of an auditory object is its spectral content as a function of time, and that stimulus conditions associated with synthetic listening (e.g., common onset across frequency) can be understood in terms of the spectral profile, regardless of whether this type of processing is optimal. Further, it is proposed that a psychoacoustical phenomenon demonstrating across-channel processing with amplitude modulated stimulus components, such as CMR, can be understood in terms of short-term spectral cues. Experiments will use standard psychoacoustical methods with human observers to test qualitative predictions of this approach, using paradigms associated with both facilitation and interference. Results will be analyzed using standard parametric statistical techniques, primarily repeated measures ANOVA. Data from these as well as published studies will be modeled in order to obtain quantitative predictions for a range of phenomena involving across frequency masking and masking release.

描述（由申请人提供）：近年来，越来越多的心理声学证据表明，落在信号频率区域之外的刺激成分可能对该信号的处理产生显着影响。在轮廓分析和共调制掩蔽释放 (CMR) 中，其效果是降低阈值：侧翼刺激成分的存在往往会提高灵敏度。在其他现象中，例如跨通道掩蔽，侧翼成分的作用是提高阈值。当前项目的目标是开发一个跨渠道处理模型，捕获促进效应和干扰效应。该模型基于以下前提：听觉对象与生态最相关的特征是其作为时间函数的频谱内容，并且与合成听力相关的刺激条件（例如，跨频率的共同起始）可以理解为光谱轮廓，无论这种类型的处理是否是最佳的。此外，有人提出，可以用短期频谱线索来理解用调幅刺激成分（例如 CMR）进行跨通道处理的心理声学现象。实验将使用标准心理声学方法与人类观察者一起使用与促进和干扰相关的范式来测试这种方法的定性预测。将使用标准参数统计技术（主要是重复测量方差分析）对结果进行分析。来自这些以及已发表研究的数据将被建模，以便获得涉及跨频率掩蔽和掩蔽释放的一系列现象的定量预测。