Effects of familiarization on dysarthric speech intelligibility: acoustic correla

描述（由申请人提供）：本研究的长期目标是通过增加我们对言语障碍的言语感知的知识，为构音障碍患者及其对话伙伴开发沟通辅助工具。沟通需要说话者和听话者之间的相互作用（Lindbloom 1990），因此必须考虑两者 面向说话者的因素和面向说话者的因素，导致可懂度增强， 发音困难的演讲者与诸如说话风格操纵之类的面向说话者的因素相比，较少关注面向说话者的因素，诸如信号依赖因素（例如，对语音的熟悉度）和与信号无关的因素（例如，主题提示）。关于听众的信号依赖因素，以前的研究一般认为，构音障碍的经验提高了听众的能力，感知的讲话。然而，研究者并没有完全了解熟悉训练的哪些因素限制或促进熟悉效果。此外，一个问题仍然在很大程度上没有回答的潜在机制的可理解性的改善，由于听众的熟悉的讲话。更好地了解这一机制将揭示方法，以加快熟悉的过程中，从而使扬声器与构音障碍，以更少的预通信开销与新的会话伙伴进行交互。感知理论认为，当语音质量下降时，听者需要通过感知重组来理解语音。此外，它是假设，听者的感知重组导致可懂度的提高，由于改善映射语音信号的声学特征到音位表示。拟议的研究将推进知觉重组假说，通过比较不同的熟悉范式对构音障碍的单词和音素可懂度的影响，并试图了解熟悉效应的声学基础。目标语音将是我们收集的通用访问数据的子集。它为拟议的研究提供了独特的优势：它包含了大量的录音与CP相关的构音障碍，在广泛的严重程度，以及年龄/性别匹配的控制扬声器的扬声器产生的话。这项研究的结果是至关重要的，推进我们的知识，言语知觉一般，以及提供经验证据，以发音障碍的管理为导向的干预技术。研究结果还将直接指导下一阶段工作中的语音输入语音输出通信辅助工具等通信辅助工具的开发。 公共卫生相关性：拟议的研究将导致一个听众的经验，无序的讲话提高他或她的理解能力的理解，什么样的熟悉训练是最有效的。研究结果将指导发展的沟通援助的人谁有运动言语障碍和他们的谈话伙伴。

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.