基于16子带滤波器组的助听器啸叫检测与抑制算法  

Howling Detection and Suppression Algorithm Based on 16-Band Filterbank for Hearing Aids

作　　者：石东宇 陈霏 郎标 邱智乾 姬俊宇 SHI Dongyu;CHEN Fei;LANG Biao;QIU Zhiqian;JI Junyu(Tianjin Key Laboratory of Imaging and Sensing Microelectronic Technology,School of Microelectronics,Tianjin University,Tianjin 300072,China;Research Institute of Tsinghua University in Shenzhen,Shenzhen Guangdong 518057,China;Shenzhen Eartech Company Limited,Shenzhen Guangdong 518172,China)

机构地区：[1]天津大学微电子学院,天津市成像与感知微电子技术重点实验室,天津300072 [2]深圳清华大学研究院,广东深圳518057 [3]深圳市智听科技有限公司,广东深圳518172

出　　处：《传感技术学报》2023年第7期1032-1040,共9页Chinese Journal of Sensors and Actuators

基　　金：国家重点研发计划项目(2016YFA0202201);深圳市科技计划项目(JSGG20191129141019090,JCYJ20210324115610028,JSGG20210713091808027)。

摘　　要：听力损失患者在使用助听器的过程中,常常因为啸叫问题而倍感苦恼。基于陷波器的啸叫检测与抑制算法通常在DSP上进行实现,存在处理延迟高和资源消耗多的问题。为此,基于16子带的全相位FIR滤波器组,提出了一种低延迟、适合电路化的啸叫检测与抑制算法。对于一个指定的子带信号,当子带-低频平均能量比和子带-全带对数相似度同时大于0时,认为啸叫存在,之后降低该子带信号的增益值以抑制啸叫。仿真结果显示,相比于传统算法,当检测概率为88.57%时,所提算法的误警概率更低;平均最大稳定增益的增量更高,且语音质量感知评估值达3分以上。硬件测试中,系统处理延时为8.535 ms,能够及时地对啸叫进行检测与抑制,满足助听器资源消耗和实时处理的应用需求。Hearing loss patients often suffer from whistling problems when using hearing aids.The notch-filter-based howling detection and suppression algorithms are usually implemented on DSP,which has a high processing delay and consumes many resource.There-fore,a low-delay,circuit-suitable howling detection and suppression algorithm based on the 16-band all-phase FIR filterbank are pro-posed.For a designated subband signal,the howling is detected when the sub-band to low average energy ratio and the sub-band to full-band logarithmic similarity are greater than zero at the same time.Then the subband gain reduced to suppress howling.The simulation results show that compared with the traditional howling detection algorithms,the false alert probability of the proposed algorithm is lower when the detection probability is 88.57%;the maximum stable gain increment is larger,and the perceptual evaluation value of speech quality reaches 3 points or more.In the hardware tests,the system can detect and suppress howling in time with the processing delay of 8.535 ms,which meets hearing aids requirements of resource consumption and real-time processing.

关 键 词：声反馈抑制 啸叫检测 滤波器组 助听器 FPGA实现 

分 类 号：TN912.3[电子电信—通信与信息系统]