Experimental and theoretical studieson the auditory system for speech perception

我们对听觉系统进行了实验和计算研究，这为语音感知提供了基础。1）对语音大小和形状的感知：我们发现有声和耳语的大小JND几乎相同，即使对于短声音也足够小。2）听觉滤波器特性和听力受损和正常听力的感知：我们提出了一种新的方法来同时测量听觉滤波器的选择性和压缩。3）功能磁共振成像（fMRI）实验：我们研究了听觉皮层中大小处理的位置。4）语音感知和信号处理的建模：我们证明了在声道长度估计任务中，伽马线性滤波器组优于传统的梅尔频率滤波器组。我们还改进了语音实验的STRAIGHT系统。

We performedthe experimentaland computational studies on the auditory systemwhich provides the basis of speech perception.1) Perception of size and shape from speech sounds: We found the size JNDs are almost the same for voiced and whispered speechand sufficiently small even for short sounds.2) Auditory filter characteristics and perception by hearing impaired and normal hearing:We proposed a new method to measure auditory filter selectivity and compression simultaneously. Wedeveloped a signal processing techniquetosimulatehearing impairment within a unified gammachirp framework.3) Functional MRI (fMRI) experiments:We studied the location of size processing in the auditory cortex.4) Modeling of speech perception and signal processing:We demonstrated the gammachirp filterbank outperformsconventional mel-frequencyfilterbanksin the task of vocal tract length estimation. We also improvedthe STRAIGHT systemfor speech experiments.