基于可重构滤波器组的“个体化”数字助听系统滤波算法研究

项目名称： 基于可重构滤波器组的“个体化”数字助听系统滤波算法研究

项目编号： No.61201372

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 电子学与信息系统

项目作者： 魏莹

作者单位： 山东大学

项目金额： 24万元

中文摘要： 目前，听力损失已经成为影响人们生活的最常见疾病之一，数字助听器的使用是弥补听力损失最有效的方法。当前，数字助听系统采用的滤波器组算法仅能提供单一频率划分方案来分解声音信号，无法使听损患者根据自身的听力损失特点获得最佳的声音补偿策略。基于此，本课题研究适用于数字助听系统的低复杂度、无失真的可重构滤波器组算法，以实现根据患者听损特点提供灵活频率划分方案的目标。该算法能够在不改变滤波器组基本结构的前提下，通过对控制参数的调节来依据患者的听力损伤病理设定系统的频带数目和频带带宽，从而方便选择要强调的声音功能，使患者得到更好的舒适度。基于此算法，本课题将同时设计有效的增益控制算法和噪声与回声抑制联合算法。本研究为开发具备可控声音分解方式的新型数字助听设备提供了技术准备，将大大提高助听系统的"个体化"程度，有效提升听损患者的生活质量。

中文关键词： 数字助听系统；可重构滤波器组；频率遮蔽技术；噪声抑制；

英文摘要： Today hearing loss has become one of the most common diseases that influence people's lives. The use of digital hearing aids is the most effective way to compensate for hearing loss. Currently, the filter bank algorithms that digital hearing aid systems employed can only give one frequency division plan to decompose the sound signal, therefore cannot provide hearing impaired people the best compensation according to their own characteristics of hearing loss. To solve this problem, in this project, efficient algorithms with low complexity, no distortion and reasonable delay will be proposed based on reconfigurable filter banks. By adjusting the control parameters, the number of bands and the bandwidths can be changed based on the pathology of the patient, making it convenient to emphasize the sound to look for the patient's comfort. On the basis of the design of the reconfigurable filter banks, gain control algorithms, noise reduction algorithms and feedback suppression algorithms will also be discussed. This study provides technical preparation for the development of controllable sound decomposition of new digital hearing aid devices, which will enhance the "individual" level of current hearing aid systems, thus improve the quality of life of patients with hearing loss.

英文关键词： digital hearing aids；reconfigurable filterbank；frequency-response masking；noise reduction；