Development of Amplitude Modulation as a Grouping Cue

作为分组提示的幅度调制的发展

• 批准号: 6790457
• 负责人: Dawna E. Lewis
• 金额: $ 2.92万
• 依托单位: UNIVERSITY OF NEBRASKA LINCOLN
• 依托单位国家: 美国
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-03-17 至 2006-03-16
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6790457
• 关键词: adolescence (12-20); adult human (21+); age difference; auditory discrimination; behavior test; behavioral /social science research tag; clinical research; cues; developmental psychology; human subject; learning; middle childhood (6-11); neural information processing; noise; predoctoral investigator; preschool child (1-5); sound frequency; sound perception; speech recognition

DESCRIPTION (provided by applicant): The aim of this research proposal is to determine whether children use amplitude comodulation (AM) as a grouping cue in the formation of auditory objects. Specifically, auditory object formation refers to the ability to separate the auditory foreground from the background. This project will examine whether children's ability to use AM as a grouping cue is different from adults and whether this ability changes with development. Although researchers are currently studying auditory object formation in adults, little is known about the development of this phenomenon in children. Because the study of auditory grouping in speech perception is complicated by the fact that speech contains numerous acoustic characteristics, time varying sinusoidal (TVS) speech will be used. These stimuli do not contain typical acoustic characteristics of speech and have been used in previous studies to examine auditory grouping in adults. New stimuli will be developed based on age-appropriate sentences. This project will examine the ability of adults and children to use AM as an auditory grouping cue in the perception of TVS sentences. Speech recognition of TVS sentences (unmodulated and AM at four frequencies) will be obtained. It is hypothesized that children are less able than adults to use AM as an auditory grouping cue and that children's ability to use this information improves with age. The results of this study will enhance our knowledge of the process of auditory object formation in children's speech perception.

描述（由申请人提供）：本研究建议的目的是确定儿童是否使用振幅综合（AM）作为在形成听觉对象中的分组提示。具体而言，听觉对象的形成是指将听觉前景与背景区分开的能力。该项目将检查儿童使用AM作为分组提示的能力是否与成年人不同，以及这种能力是否随发展而变化。尽管研究人员目前正在研究成年人的听觉对象，但对儿童这种现象的发展知之甚少。由于语音感知中的听觉分组的研究使语音包含众多声学特征这一事实变得复杂，因此会使用随时间变化的正弦（TVS）语音。这些刺激不包含语音的典型声学特征，并且在先前的研究中已被用于检查成人的听觉分组。新的刺激将根据适合年龄的句子开发。该项目将研究成年人和儿童在电视句子中使用AM作为听觉分组的能力。将获得对电视句子的语音识别（未修改和AM在四个频率下）。假设儿童比成年人使用AM作为听觉分组提示的能力少，并且儿童使用此信息的能力随着年龄的增长而提高。这项研究的结果将增强我们对儿童言语感知中听觉对象形成过程的了解。