Modulation of the Voice Related to Tremor and Vibrato

与震颤和颤音相关的声音的调制

• 批准号: 8454044
• 负责人: Rosemary Anne Lester-Smith
• 金额: $ 4.17万
• 依托单位: UNIVERSITY OF ARIZONA
• 依托单位国家: 美国
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-08-15 至 2014-08-14
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8454044
• 关键词: Acoustics; Affect; American; Area; Breathing; Cerebellar Diseases; Characteristics; Complex; Computer Simulation; Computers; Coupled; Diagnosis; Disease; Dystonia; Essential Tremor; Frequencies; Individual; Larynx; Length; Modeling; Modification; Movement Disorders; Output; Pathologic; Perception; Phonation; Physiological; Production; Research; Sampling; Severities; Shapes; Simulate; Source; Speech; System; Training; Tremor; Voice; Voice Disorders; base; effective intervention; kinematics; nervous system disorder; pressure; sound; vocal cord

DESCRIPTION (provided by applicant): Modulation of the voice is a result of physiologic oscillation within one or more components of the vocal system including the breathing apparatus (i.e., pressure supply), the larynx (i.e. sound source), and the vocal tract (i.e., sound filter). These oscillations may be caused by pathologic tremor associated with neurological disorders like essential tremor or by volitional production of vibrato in singers. Because the acoustic characteristics of voice modulation specific to each component of the vocal system and the effect of these characteristics on perception are not well-understood, it is difficult to assess individuals with tremor affecting the voice and to determine the most effective interventions for reducing the perceptual severity of the disorder. The purpose of this study is to determine how the acoustic characteristics associated with laryngeal-based vocal tremor affect the perception of the magnitude of voice modulation, and to determine if adjustments can be made to the voice source and vocal tract filter to alter the acoustic output and reduce the perception of modulation. This research will be carried out using both a computational model of speech production and trained singers producing vibrato to simulate laryngeal-based vocal tremor. A kinematic model of the vocal folds coupled to a parametric model of the vocal tract area function will be used to simulate laryngeal-based vocal tremor with different voice source characteristics (i.e., vocal fold length and degree of vocal fold adduction) and different vocal tract filter characteristics (i.e., vowel shapes). It is expected that, by making adjustments to the voice source and vocal tract filter that reduce the amplitude of the upper harmonics, the characteristics of the acoustic output will be altered and the perception of magnitude of voice modulation will be reduced. In addition, trained singers will be asked to make the same adjustments to the voice source and vocal tract filter to investigate whether individuals can volitionally modify these characteristics to alter th acoustic output and reduce the perception of the magnitude of voice modulation. The findings from this study will have implications for selecting appropriate compensatory strategies to reduce the perceptual severity of modulation of the voice for individuals with tremor affecting the larynx. PUBLIC HEALTH RELEVANCE: The findings from this study will clarify how the acoustic characteristics associated with laryngeal-based vocal tremor and vibrato contribute to the perception of magnitude of modulation of the voice, as well as identify what physiologic modifications individuals can make to alter the acoustic output and reduce the perception of modulation. It is expected that this information will be useful in selecting appropriate compensatory strategies for individuals with tremor affecting the larynx to minimize the impact of this voice disorder on the lives of those affected by neurological disorders including essential tremor, cerebellar dysfunction, and dystonia.

描述（由申请人提供）：声音的调制是发声系统的一个或多个组件内生理振荡的结果，包括呼吸器（即压力源）、喉部（即声源）和声道（即声音过滤器）。这些振荡可能是由与神经系统疾病（如特发性震颤）相关的病理性震颤或歌手有意识地产生颤音引起的。由于发声系统每个组成部分特有的声音调制的声学特征以及这些特征对感知的影响尚不清楚，因此很难评估患有影响声音的震颤的个体并确定降低疾病感知严重程度的最有效的干预措施。本研究的目的是确定与基于喉部的声音震颤相关的声学特征如何影响对语音调制幅度的感知，并确定是否可以对声源和声道滤波器进行调整以改变声输出并减少调制感知。 这项研究将使用语音产生的计算模型和训练有素的歌手产生颤音来模拟基于喉部的声音震颤。声带的运动学模型与声道面积函数的参数模型相结合，将用于模拟具有不同声源特征的基于喉部的声音震颤（即，声带 声带内收的长度和程度）以及不同的声道​​滤波器特征（即元音形状）。预计通过对音源和声道滤波器进行调整以降低高次谐波的幅度，可以改善声学输出的特性 将会改变并且对语音调制幅度的感知将会降低。此外，训练有素的歌手将被要求对声源和声道滤波器进行相同的调整，以调查个人是否可以自愿修改这些特征以改变声学输出并减少对声音调制幅度的感知。这项研究的结果将对选择适当的补偿策略产生影响，以减少影响颤抖的个体声音调制的感知严重程度。 喉。 公共健康相关性：这项研究的结果将阐明与喉部发声震颤和颤音相关的声学特征如何影响声音调制幅度的感知，并确定个人可以做出哪些生理改变来改变声音输出并减少调制感知。预计这些信息将有助于为喉部震颤患者选择适当的补偿策略，以尽量减少这种声音障碍对神经系统疾病（包括特发性震颤、小脑功能障碍和肌张力障碍）患者生活的影响。