现代助听器的降噪技术(单麦克风类)和性能(2)

张戌宝;

1:瑞士Sonova助听器集团加拿大分部 Unitron研发部

摘要

<正>4其它降噪技术4.1风噪声降低技术风沿着人头吹时,可在耳朵附近产生风湍流,这是一种近场风流,会在助听器麦克风入口处产生较大噪声;如果是方向性麦克风,则噪声输出增加2025dB[9]。风噪声的频域能量主要分布在甚低频,因而最简单的降噪技术就是降低低频道的增益,如1kHz以下。风噪声大小与麦克风入口的形状有关,巧妙地设计麦克风入口过滤器也可以降低风噪声;一些助听器利用外壳自身的装

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作者

张戌宝;

参考文献

1 Theodore HV,著.张戌宝,田岚,译.实用助听器原理和技术[M].第二版.北京:人民军医出版社,2013.18~19,200~201.

2 Hamacher V,Chalupper J,Eggers E,et al.Signal processing in high-end hearing aids:state of the art,challenges,and future trends[J].EURASIP Journal on ASP,2005,18:2915.

3 Josef C,Thomas AP.New algorithm is designed to take the annoyance out of transient noise[J].Hearing Journal,2007,60:42.

4 Francis KK,Carsten PM.Noise-management algorithm may improve speech intelligibility in noise[J].Hearing Journal,2006,59:62.

5 Mark CF.Maximizing the voice-to-noise ratio(VNR)via voice priority processing[J].Hearing Review,2004,11:54.

6 Phonak Insight.Binaural voice stream technology[M].Stfa:Phonak published,2012.2.

7 Ricketts TA,Hornsby BW.Sound quality measures for speech in noise through a commercial hearing aid implementing digital noise reduction[J].J Am Acad Audiol,2005,16:270.

8 Elberling C.News from oticon-audiological research documentation[M].Smrum:Phonic Ear published,2002.4~5.

9 Ruth B,Li-Kuei C.Digital noise reduction:an overview[J].Trends in Amplification,2006,10:67.

10 Nicole M,Christine RM,Gerald K.Evaluating the benefit of hearing aids in solving the cocktail party problem[J].Trends Amplif,2008,12:300.

11 Anastasios S,Sridhar K,Brent E,et al.Objective measures of listening:effects of background noise and noise reduction[J].J of Speech Language and Hearing Research,2009,52:1230.

12 郗昕.噪声下的语音测听-评价助听器效果的重要手段[J].中国听力语言康复科学杂志,2008(6):27.

13 Lise BH.Epoq study measures user benefits[J].Hearing Journal,2008,61:47.

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