ACOUSTIC AND PERCEPTUAL INVARIANCE IN SPEECH

声学不变性理论声称， 自然语言中使用的特征可以由不变量来表征， 直接从声学信号导出的特性，即感知 机制是专门调整，以提取这些属性，他们 形成了在进行中的语音感知中使用的主要感知属性。 这是拟议的研究的目标，探讨这些问题。 本 最后，我们计划继续调查关节在停止的位置 辅音通过探索频谱形状的作用，作为一个知觉线索， 唇和牙槽关节的位置，并通过研究声学 发音的另一个地方的特性，停止辅音中的牙齿。 我们的方法将包括自然语音的声学分析， 英语和其他语言以及感性研究利用这两个 自然和合成的语音刺激。 此外，我们计划探讨 特征对比，停止滑行，与声学理论有关 不变性 我们的方法将包括尝试分离 在对自然语音进行了详细的声学分析后， 提供该属性的操作定义，测试其 一组新的自然语音数据的有效性，然后探索 这种性质的知觉后果使用合成和天然 用于识别特定属性的语音刺激。 我们 最终目的是表征声学特性的清单 对应于自然语言中使用的语音的有限集合。 这样的研究有助于描述言语加工的本质 系统及其基本机制，以及提供一个必要的 为描绘语言发展过程的基线， 幼儿和脑损伤对这种处理能力的影响。

A theory of acoustic invariance claims that the universal set of phonetic features used in natural language can be characterized by invariant properties derived directly from the acoustic signal, that the perceptual mechanism is specifically tuned to extract these properties, and that they form the primary perceptual attributes used in ongoing speech perception. It is the goal of the proposed research to explore these issues. To this end, we plan to continue to investigate place of articulation in stop consonants by exploring the role of spectral shape as a perceptual cue to the labial and alveolar place of articulation and by studying the acoustic properties of another place of articulation, dentals in stop consonants. Our methodology will consist of acoustic analysis of natural speech from English and othe languages as well as perceptual studies utilizing both natural and synthetic speech stimuli. In addition, we plan to explore the feature contrast, stop-glide, in relation to a theory of acoustic invariance. Our methodology will consist of attempting to isolate the invariant property after detailed acoustic anslyses of natural speech, providing an operational definition of that property, testing its effectiveness on a new set of natural speech data, and then exploring the perceptual consequences of this property using both synthetic and natural speech stimuli for the identification of the particular property. Our ultimate aim is to characterize the inventory of acoustic properties corresponding to the finite set of speech sounds used in natural language. Such study should help characterize the nature of the speech processing system and its underlying mechanisms, as well as provide an essential base-line for delineating the developmental processes for speech in the young child and the effects of brain-damge on such processing abilities.