The Relative Amplitude of Vowel Formants

元音共振峰的相对振幅

• 批准号: 6690727
• 负责人: EWA JACEWICZ
• 金额: $ 7.38万
• 依托单位: OHIO STATE UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-01-01 至 2005-12-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6690727
• 关键词: Relative; Amplitude; Vowel; Formants

DESCRIPTION (provided by applicant): The long-term objective of this research is to characterize the role of relative intensity of speech segments in the auditory processing of vowels and consonants within larger prosodic domains such as words. The role of intensity in speech processing has not been explored in a systematic way and its exact contribution is unknown. This application focuses on vowels and investigates the relative amplitude of vowel formants as a cue to making phonemic distinctions. Two specific aims are: 1) to examine the acoustic pattern of the relative amplitude of formants in the production of selected coarticulated and isolated vowels; and 2) to examine the auditory effect of manipulation of formant levels on listeners' decision about vowel quality and intelligibility of words. The proposed acoustic study is an extension of an early work on vowel intensity by House & Fairbanks (1953) to formant levels (F1, F2, F3, F4). Its goal is to establish whether and how vowel intensity is distributed over formant levels and whether this distribution varies with consonantal context. The proposed perception study investigates listeners' response to changes in the relative amplitude of formants for isolated vowels and for vowels in word context. Pilot data show that intensity of formants is a cue to vowel categorization. 24 subjects will be used to further test the patterns of formant levels in a larger set of American English vowels. The acoustic and perceptual relevance of these patterns aims to provide basic understanding about the way the vowel cues are integrated in a single percept when temporal and contextual factors reduce time for their processing in natural speech. Since the dynamic range in the intensity of sounds has been shown to have a dramatic effect on hearing aid performance, and since around one half of the Americans over the age of 65 may be candidates for amplification this research has implications for the quality of health care for these individuals.

描述（由申请人提供）：本研究的长期目标是表征语音段相对强度在元音和辅音等较大的韵律域（例如单词）内的听觉处理中的作用。强度在语音处理中的作用尚未以系统的方式探索，并且其确切的贡献尚不清楚。该应用集中在元音上，并研究了元音实圈的相对幅度，作为使音调区分的提示。两个具体的目的是：1）检验在选定的共插入和分离元音的产生中，共振剂相对幅度的声学模式； 2）检查操纵共振剂级别对听众对元音质量和单词清晰度的决定的听觉效果。拟议的声学研究是House＆Fairbanks（1953）（F1，F2，F3，F4）对元音强度的早期工作的扩展。它的目标是确定元音强度是否以及如何在增强级别上分布，以及该分布是否随辅音上下文而变化。拟议的感知研究调查了听众对孤立元音和单词上下文中元音相对幅度的相对幅度变化的反应。试验数据表明，共振剂的强度是元音分类的提示。 24名受试者将用于进一步测试一组较大的美国英国元音中的共振峰水平模式。这些模式的声学和感知相关性旨在在时间和上下文因素减少其在自然语音中处理的时间时，将元音提示的方式整合到单个感知中。由于声音强度的动态范围已被证明对助听器的表现产生了巨大影响，并且由于65岁以上的美国人中有一半的美国人可能是放大的候选者，因此，这项研究对这些人的医疗保健质量有影响。