Effects of familiarization on dysarthric speech intelligibility: acoustic correla

熟悉度对构音障碍语音清晰度的影响：声学相关性

• 批准号: 8433204
• 负责人: Heejin Kim
• 金额: $ 15.2万
• 依托单位: UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGN
• 依托单位国家: 美国
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-26 至 2015-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8433204
• 关键词: Acoustics; Age; Attention; Communication; Cues; Data; Development; Dysarthria; Elements; Familiarity; Gender; Goals; Intervention; Knowledge; Lead; Maps; Methods; Motor; Output; Perception; Perceptual Disorders; Phase; Process; Property; Research; Research Personnel; Severities; Signal Transduction; Speech; Speech Disorders; Speech Intelligibility; Speech Perception; System; Techniques; Testing; Training; Voice; Work; base; communication aid; experience; improved; phonology; theories

DESCRIPTION (provided by applicant): The long-term goal of this research is to benefit the development of communication aids for people with dysarthria and their conversation partners by increasing our knowledge of speech perception for disordered speech. Communication entails mutual speaker-listener interactions (Lindbloom 1990), thus it is critical to consider both speaker-oriented factors and listener-oriented factors that lead to intelligibility enhancement for speakers with dysarthria. Compared to speaker-oriented factors such as speaking style manipulations, less attention has been directed to listener-oriented factors such as signal-dependent factors (e.g., familiarity to the speech) and signal-independent factors (e.g., topic cue). Concerning signal-dependent factors for listeners, previous studies generally suggest that experience with dysarthric speech improves a listener's ability to perceive the speech. However, researchers do not have a full understanding of what elements of familiarization training restrict or promote familiarization effects. Further, a question remains largely unanswered concerning the underlying mechanism of intelligibility improvement due to a listener's familiarity with the speech. A better understanding of this mechanism will reveal methods to expedite the familiarization process, thereby allowing speakers with dysarthria to interact with new conversation partners with less pre-communication overhead. The perception theory hypothesizes that when speech is degraded, perceptual reorganization is necessary for listeners to understand the speech. In addition, it is hypothesized that listeners' perceptual reorganization leads to intelligibility enhancement due to improved mapping of acoustic features of speech signal into phonological representations. The proposed research will advance the perceptual reorganization hypothesis, by comparing the effects of different familiarization paradigms on the word and phoneme intelligibility of dysarthria and by seeking to understand the acoustic basis of familiarization effects. The target speech will be a subset of the Universal Access data we collected. It offers unique advantages for the proposed studies: it contains recordings of a large number of words produced by speakers with CP-related dysarthria in a wide range of severity as well as age/gender-matched control speakers. Results of this research are critical for advancing our knowledge of speech perception in general, as well as for providing empirical evidence for listener-oriented intervention techniques in the management of dysarthria. Findings will also directly guide the development of communication aids such as voice-input voice-output communication aids in the next phase of this work. PUBLIC HEALTH RELEVANCE: The proposed studies will lead to an understanding of how a listener's experience with disordered speech improves his or her ability to understand the speech, and what type of familiarization trainings is most effective. Findings will direct the development of communication aids for people who have motor speech disorder and their conversation partners.

描述(申请人提供)：这项研究的长期目标是通过增加我们对语音障碍的言语感知的知识，为构音障碍患者和他们的对话伙伴开发交流辅助工具。交际需要说话人和听话人的相互作用(LindBloom 1990)，因此考虑两者是至关重要的 以说话人为导向的因素和以听众为导向的因素对提高英语语言清晰度的作用 有构音障碍的说话者。与说话者导向的因素(如说话风格操纵)相比，听者导向的因素(如信号依赖因素(例如，对演讲的熟悉程度)和信号无关的因素(如话题线索))受到的关注较少。关于听者的信号依赖因素，以前的研究一般认为，发音障碍的经历可以提高听者感知语音的能力。然而，对于熟悉训练的哪些要素制约或促进熟悉效果，研究者们并没有充分的认识。此外，由于听者对讲话的熟悉，关于提高可理解性的潜在机制的问题在很大程度上仍然没有得到回答。对这一机制的更好理解将揭示加快熟悉过程的方法，从而使有构音障碍的说话者能够以较少的预沟通开销与新的对话伙伴互动。知觉理论假设，当言语退化时，听者必须进行知觉重组才能理解言语。此外，还假设由于语音信号的声学特征映射到语音表示的改进，听者的知觉重组导致了可理解性的提高。本研究将通过比较不同熟悉范式对构音障碍的单词和音素可理解性的影响，并试图了解熟悉效应的声学基础，从而提出知觉重组假说。目标语音将是我们收集的通用接入数据的子集。它为拟议的研究提供了独特的优势：它包含了大量由患有严重程度的CP相关构音障碍的说话者以及年龄/性别匹配的对照说话者产生的大量单词的录音。这项研究的结果对于提高我们对言语知觉的总体认识至关重要，也为以听者为导向的干预技术在构音障碍管理中的应用提供了经验证据。在这项工作的下一阶段，调查结果还将直接指导诸如语音输入和语音输出等通信辅助设备的开发。 与公共健康相关：拟议的研究将导致理解听者的言语障碍经历如何提高他或她理解演讲的能力，以及哪种类型的熟悉培训最有效。这些发现将指导为运动性言语障碍患者及其对话伙伴开发交流辅助工具。