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一种适用于助听器的低失调自适应指向性算法 被引量：1

A low-misadjustment adaptive directional algorithm for hearing aids
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摘要 在噪声环境中助听器的性能会受到严重影响。但当噪声与期望信号处在不同方向时,在助听器中使用指向性传声器系统能够有效地抑制噪声,使助听器的使用者受益。本文基于自适应LMS(最小均方)算法提出了一种适用于助听器的低失调自适应指向性算法,用以动态调整传声器系统中滤波器的系数,使指向性模式的灵敏度最低点朝向噪声源方向,达到降噪的目的。相比于现有的LMS算法,本文引入了一种后验信噪比并将与其相关的信噪比补偿因子引入自适应步长的更新过程,有效改善了语音信号存在时的失调情况。最后,本文通过仿真验证了本文算法对失调的改善作用。 The performance of hearing aids may degrade severely in noisy environment.If noise and desired sound are at different directions,a directional microphones system is able to suppress the noise in hearing aids and benefit the hearing-impaired.A low-misadjustment adaptive directional algorithm based on LMS（Least Mean Square） for hearing aids is proposed in this paper.The proposed algorithm is designed for updating coefficients of the adaptive FIR so that the null of directional pattern would face the direction of noise. Compared to the available LMS,the proposed algorithm brings in a posteriori SNR and a related SNR compensation factor to update the step so that misadjustment is improved in presence of desired sound.Finally,improvement of misadjustment has been verified by simulation results.
作者 张云翼 崔杰 肖灵
机构地区 中国科学院声学所医用声学实验室
出处 《信号处理》 CSCD 北大核心 2011年第2期241-245,共5页 Journal of Signal Processing
基金 中国科学院"科技助残行动计划"项目-高性能数字助听器(KGCX-YW-616)
关键词 自适应指向性算法 低失调 后验信噪比 信噪比补偿因子 adaptive directional algorithm low-misadjustment a posteriori SNR SNR compensation factor
分类号 TN912 [电子电信—通信与信息系统]
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参考文献10

  • 1J.V.Berghe,"An adaptive noise canceller for hearing aids using two nearby microphones,"J.Acoust.Soc.Am.,Jun.1998,vol.103,no.6:3621-3626.
  • 2K.Chung,"Challenges and Recent Developments in Hearing Aids,"Trends In Amplification,2004,vol.8,no.3:125-164.
  • 3J.Chen,L.Shue,K.Phua,H.Sun,"Theoretical compar-isons of dual microphone systems,"Acoustics,Speech,and Signal Processing,2004.Proceedings.(ICASSP'04).IEEE International Conference on.
  • 4H.C.Shin,A.H.Sayed,and W.-J.Song,"Variable stepsize NLMS and affine projection algorithms,"IEEE Signal Process.Feb.Lett.,2004,vol.11,no.2:132-135.
  • 5J.Benesty,H.Rey,L.R.Vega,and S.Tessens,"A non-parametric VSS NLMS algorithm,"IEEE Signal Process.Lett.,Oct.2006,vol.13,no.10:581-584.
  • 6L.R.Vega,H.Rey,J.Benesty,and S.Tessens,"A New Robust Variable Step-Size NLMS Algorithm,"Signal Pro-cessing,IEEE Transactions on,2008,vol.56,Issue 5:1878-1893.
  • 7F.Luo,,J.Yang,,C.Pavlovic,,A.Neuman,,"Adap-tive nallforming scheme in digital heating aids,"IEEE Trans.Signals Process.Jul.2002,SP-50(7):1583-1590.
  • 8J.M.Kates,Digital Heating Aids.San Diego,Oxford,Brisbane,Plural Publishing,2008:114-122.
  • 9B.Widrow and S.D.Stearns,Adaptive Signal Processing.Englewood Cliffs,NJ,Prentice-Hall,1985.
  • 10J Lee,HC Huang,YN Yang,SQ Huang,"A Square-Er-ror-Based Regularization for Normalized LMS Algo-rithms."Proceedings of the International MuhiConference of Engineers and Computer Scientists,2008,vol.2.

同被引文献13

  • 1Pritchard R L. Maximum directivity index of a linear point array[J].J. Acoust. Soc. Amer. ,1954,26(6):1034-1039.
  • 2S L Gay, J Benesty. Acoustic Signal Processing for Tele- communication[ M ]. [ S. L. ] : Springer,2000 : 181-237.
  • 3G W Elko, A T N Pong. A simple adaptive first-order dif- ferential microphone [ C ]. Proc. IEEE WASPAA, 1995 : 169-172.
  • 4喻径舟,李双田.基于端射阵的超指向性麦克风阵列[J].信号处理,2009,25(8A):35-38.
  • 5G W Elko, A T N Pong. A steerable and variable first-or- der differential microphone array [ C ]. Proc. ICASSP, 1997,1( 1 ) :223-226.
  • 6S Srinivasan, N Roman, D Wang, Binary and ratiotime- frequency masks for robust speech recognition [ J ]. Speech Comm. ,2006,48 : 1486-1501.
  • 7H Park, R M Stem. Spatial separation of speech signals us- ing amplitude estimation based on interaural comparisons of zero crossings [ J ]. Speech Comm. ,2009,51 ( 1 ) :15-25.
  • 8R M Stern, E Gouvea, C Kim, K Kumar, H Park. Bin- aural and multiple-microphone signal processing motivated by auditory perception [ C ]. Hands-Free Speech Commu- nication and Microphone Arrays,2008:98-103.
  • 9Brian C J Moore. Hearing[M]. IS. L. ] :Academic Press, 2002 : 347 -386.
  • 10A N Popper, R R Fay. Sound Source Localization [ M ]. [ S. L. ] :Springer,2005:272-316.

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信号处理
2011年 第2期

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