DISCRIMINATION AND IDENTIFICATION OF AUDITORY PATTERNS

人类听觉系统提取意义的非凡能力 从连续的人类语言中可以更全面地理解与 听者“倾听”复杂声音细节的能力 将军。提案研究将确定听觉的极限 正常听者对一种声音的辨别和识别能力 各种复杂的声音。这些实验首先扩展了早期的工作 和音调模式，并发展了一个更新的调查路线 频谱复杂的声音。关于声调模式的拟议研究包括 分为三类，每一类都涉及 对复杂声音的辨别或识别。这些是1) 能够区分不同类型的复杂图案 光谱和时间微结构；2)识别能力 形成定义模式的不变量的关系属性 各种类型的转换；以及3)解析模式的能力 不同模式不确定性(或熟悉度)下的细节。 第二个系列的实验将调查 总持续时间比例(PTD)规则，该规则已被证明是 一个非常强大的预测因子，可以推断出 各种不熟悉的复杂声音的组成部分。最近的两个 复杂声音识别的理论模型，该模型基于 信息性内容，另一个是关于 刺激能够预测PTD规则结果的一般形式。 将进行实验，以确定这些模型中的哪一种可提供 更全面地说明解决以下问题的能力 复杂的声音。第三系列实验将确定 听众解决动态变化的细节的能力， 频谱复杂的声音，使用非语音刺激，包括一些 语音的特性。这些研究将调查 各种类型的光谱复杂性，包括一类新的 关于听者识别语言特征的实验研究 复杂的过滤器。基础听力测验的改良版 能力也将得到发展。

The remarkable ability of the human auditory system to extract meaning from continuous human speech can be more fully understood in relation to listeners' abilities to "hear out" the details of complex sounds in general. The proposal research will determine the limits of auditory discrimination and identification abilities of normal listeners for a variety of complex sounds. These experiments first extend earlier work with tonal patterns and develop a more recent line of investigation with spectrally complex sounds. The proposed studies with tonal patterns are divided into three categories, each addressing a basic issue in the discrimination or identification of complex sounds. These are 1) the ability to discriminate between complex patterns with various types of spectral and temporal microstructure; 2) the ability to recognize relational properties that form the invariant that define a pattern under various types of transformations; and 3) the ability to resolve pattern detail under different levels of pattern uncertainty (or familiarity). A second series of experiments will investigate the generality of the proportion-of-the-total-duration (PTD) rule, which has been shown to be a remarkably strong predictor of the deductibility of changes in components of a variety of unfamiliar complex sounds. Two recent theoretical model for the discrimination of complex sounds, one based on informational content and the other on the physical properties of the stimulus are able t o predict the general form of the PTD-rule results. Experiments will be conducted to determine which of these models provides the more comprehensive account of the ability to resolve the details of complex sounds. A third series of experiments will determine the abilities of listeners to resolve the details of dynamically varying, spectrally complex sounds, using non-speech stimuli that include some of the properties of speech. These studies will investigate the effects of various types of spectral complexity, including a new class of experiments on listeners' abilities to recognize the characteristics of complex filters. An improved version of the Test of Basic Auditory Capabilities will also be developed.