双驱动模式下的普通话声调双耳分听研究

项目名称： 双驱动模式下的普通话声调双耳分听研究

项目编号： No.11474309

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 原猛

作者单位： 中国科学院声学研究所东海研究站

项目金额： 85万元

中文摘要： 本项目的研究目的为通过测量双耳分听汉语声调揭示母语为汉语的正常听力及认知能力儿童和成人的跨区域指令驱动（由上至下）及激励驱动（由下至上）的信息处理机制。双耳分听声调反映了一种回想两个分别同步在两只耳朵播放的不同声调信号的能力。该项目的研究成果主要为双耳分听汉语声调的发展及变化标准参考数据，可作为诊断患有信息处理障碍人士的评价标准。我们推断：（1）儿童回想来自左耳声刺激的能力将随着年龄增长而变好并最终接近右耳水平。这一现象反映了由下至上的激励驱动处理的成熟；（2）双耳分听汉语声调受声调信号中的时频特性影响，如时域包络、频率分辨率、及音高轮廓等；（3）成人双耳分听能力的下降与和年龄相关的高级认知衰退有关，如记忆力、注意力随年龄的衰退。为了验证上述假设，我们将开发一系列针对儿童及成人的双耳分听汉语声调感知测试平台对正常听力和正常认知能力者进行系统评估。

中文关键词： 心理声学；听觉感知；信号处理

英文摘要： This study aims to reveal cross-sectionally instructional-driven (top-down) and stimulus-driven (bottom-up) information processing via measures of dichotic listening (the ability to recall two different acoustic stimuli presented simultaneously, one in the right ear and one in the left ear) using lexical tones in Mandarin-speaking children and adults. The developmental and progress normative data will be used to benchmark against which profiles of people with information-processing disabilities can be determined. We hypothesize that (1) The ability of children to freely recall stimuli presented to the left ear catches up with the right ear with age. This phenomenon reflects the maturation of the bottom-up stimulus-driven processing; (2) The dichotic listening performance can be affected by the presentation of temporal envelope, frequency resolution, and pitch contour of the Mandarin tonal signals; (3) The disability of adults to perform dichotic listening depends on the age-related higher cognitive deficits, such as memory, attention and etc. To validate these hypotheses, we will develop a battery of dichotic listening tests with normal hearing and normal cognitive subjects.

英文关键词： Psychoacoustics;Auditory Perception;Signal Processing