Spectral Profile Cues and Synthetic Listening

频谱轮廓提示和综合听力

• 批准号: 7156966
• 负责人: Emily Buss
• 金额: $ 17.72万
• 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/7156966
• 关键词: Accounting; Affect; Analysis of Variance; Auditory; Characteristics; Condition; Cues; Data; Discrimination; Foundations; Frequencies; Goals; Human; Masks; Measures; Methods; Modeling; Neuro-Oncological Ventral Antigen 2; Process; Publishing; Range; Relative (related person); Research Personnel; Signal Transduction; Standards of Weights and Measures; Stimulus; Techniques; Testing; Time; Weight; Work; base; computerized data processing; falls; improved; programs; research study

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，落在信号的频率区域之外的刺激分量可以对该信号的处理具有显著影响。在轮廓分析和共调节掩蔽释放（CMR）中，该效应是降低阈值：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。目前的项目的目标是开发一个跨通道处理模型，捕捉促进和干扰的影响。该模型基于以下前提：听觉对象的最生态相关的特性是其作为时间的函数的频谱内容，并且与合成收听相关联的刺激条件（例如，跨频率的共同起始）可以根据频谱轮廓来理解，而不管这种类型的处理是否是最佳的。此外，它提出了一个心理声学现象，展示了跨通道处理与幅度调制的刺激成分，如CMR，可以理解的短期频谱线索。实验将使用标准的心理声学方法与人类观察者测试这种方法的定性预测，使用与促进和干扰相关的范例。将使用标准参数统计技术分析结果，主要是重复测量ANOVA。将对这些数据以及已发表的研究进行建模，以获得涉及频率掩蔽和掩蔽释放的一系列现象的定量预测。