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: 8667312
• 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/8667312
• 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; public health relevance; 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.

描述（由申请人提供）：声音的调制是包括呼吸装置（即，压力供应）、喉（即声源）和声道（即，声音滤波器）。这些振荡可能是由与神经系统疾病（如原发性震颤）相关的病理性震颤引起的，也可能是由歌手的颤音的意志产生引起的。由于特定于发声系统的每个组成部分的声音调制的声学特性以及这些特性对感知的影响尚未得到很好的理解，因此很难评估患有影响声音的震颤的个体，并确定用于降低该疾病的感知严重性的最有效干预措施。本研究的目的是确定与喉为基础的发声震颤的声学特性如何影响语音调制的幅度的感知，并确定是否可以调整的声音源和声道滤波器，以改变声学输出，减少调制的感知。 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的声音震颤。耦合到声道面积函数的参数模型的声带的运动学模型将用于模拟具有不同声源特性（即，声带 声带内收的长度和程度）和不同的声道滤波器特性（即，元音形状）。期望通过对降低高次谐波的幅度的语音源和声道滤波器进行调整，声学输出的特性 将被改变，并且声音调制的幅度的感知将被降低。此外，将要求受过训练的歌手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。这项研究的发现将对选择适当的补偿策略以减少震颤影响声音的个体的声音调制的感知严重性产生影响。 喉癌