行为学方法测试听觉响度感知的时间积分效应  

Duration dependency of loudness measured with different experimental procedures

作　　者：徐钦[1,2] 叶大田[1,2] 

机构地区：[1]清华大学生物医学工程系,北京100084 [2]清华大学深圳研究生院,深圳518055

出　　处：《清华大学学报（自然科学版）》2014年第8期1105-1111,共7页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(61271133)

摘　　要：针对音长对语音响度感知的影响即时间积分效应,采用行为学测试方法,包括量值估计法、自适应迫选法、多模态匹配法,并对多模态匹配法进行了改进,将颜色感知应用于响度评估中。为了定量分析响度感知的时间积分效应,采用指数函数对响度感知随音长的变化趋势进行了数学建模。作为参考,将1kHz纯音也用于响度感知时间积分效应的实验中,以便与复音的实验结果进行对照比较。另外,不同的测试方法间也进行了比较分析,评价参数包括单个被试内的重复测试方差、被试间的个体差异和实验时间。实验结果显示:元音的响度感知时间积分效应与纯音的结果相似,即响度随音长有先逐渐增大、后趋于饱和的趋势,且建模分析得到的时间常数均在200ms左右。改进的跨模态匹配方法在实验稳定性和高效性上均具有优势。The present study focused on analyzing the effect of sound duration on loudness perception,i.e.,temporal integration of loudness.The different behavioral experiment procedures were absolute magnitude estimation, adaptive two-interval forced choice and cross-modality matching.A loudness estimate using cross-modality matching with visual color perception was proposed.The loudness increase with duration was described by exponential functions.A pure 1kHz tone was also used for the loudness experiments as a reference. Different procedures were compared including the reliability and stability assessed by intro-individual deviations and inter-individual variations,as well as the efficiency assessed by the time spent for each experiment.The results showed the loudness temporal integration was similar to that of the 1kHz pure tone.The time constants of the two sounds estimated from the exponential function model were both around 200 ms.Cross-modality matching with color perception improved the reliability and efficiency.

关 键 词：听觉响度感知 心理声学方法 时间积分效应 

分 类 号：R318[医药卫生—生物医学工程]