频率特异性三指向性麦克风在助听器中的应用

Advantages of Frequency Specific Tri-microphone Binaural Wireless Hearing Aid Technology

张敏;段吉茸;Volkmar Hamacher;

1:西门子听力集团

2:西门子听力集团

3:西门子听力集团 苏州215021

4:苏州215021

摘要
目的比较双耳佩戴助听器时自动同步调节音量和手动分别调节音量在声源定位方面的区别以及不同噪声环境下频率特异性三麦克风和全通道三麦克风自适应指向性对言语分辨率的影响。方法40例感音神经性聋患者,均为双侧中度到重度高频下降型感音神经性听力损失,随机分为A、B两组,每组各20人,A组平均听力损失(1、24、kHz)为67.1 dB,B组平均听力损失为69.5 dB。两组患者双耳佩戴实验用两款西门子助听器ACURISP(自适应指向性模式)(A组)和Triano 3 P(自适应指向性模式)(B组)耳背机,在佩戴助听器前和3个月后分别在同一声场进行佩戴前后声源定位测试,以及单个移动噪声和多重噪声环境下言语分辨率测试,记录达到50%言语分辨率时的信噪比,即L50,并结合问卷调查对无线技术在日常生活中的便利性进行评估。结果声场评估:两组受试者在配戴助听器3个月后声源定位能力有明显差异,使用频率特异性三麦克风自适应指向性模式者复合噪声源声场中测出L50值,明显低于使用三麦克风自适应指向性模式者(P<0.01);问卷评估:绝大多数患者表示无线技术给日常助听器调节带来了很大的便利。结论自动同步音量调节对保持助听后声源定位能力作用明显,在多噪声环境下频率特异性三麦克风助听器的自适应指向性能明显提高重度成年感音神经性听力损失患者的言语分辨率,并且无线技术提高了日常调节助听器的便利性。
关键词
频率特异性三麦克风;无线助听通讯系统;自适应指向性;声源定位;声场;信噪比;言语分辨率
基金项目(Foundation):
作者
张敏;段吉茸;Volkmar Hamacher;
参考文献

1 Walker G,Dillon H,Christen C,et al.American National StandardsInstitute(ANSI).American National Standard Specification for Au-diometers(ANSI S3.6-1996)[M].New York:ANSI,1996.101~103.

2 Bentler RA,Egge J,Tubbs J,et al.(In press a)Quantification of di-rectional benefit across different polar response patterns[J].J Am A-cad Audiol,1995,34:64.

3 Boothroyd A.Speech perception,sensorineural hearing loss,and hear-ing aids.In:Studebaker G,Hochberg I,eds.Acoustical Factors Af-fecting Hearing Aid Performance[M].Boston:Allyn and Bacon,1993.277~299.

4 Greenberg J,Zurek P.Evaluation of an adaptive beam forming methodfor hearing aids[J].J Acoust Soc Am,1992,91:1 662.

5 Hawkins DB,Yacullo WS.Signal-to-noise ratio advantage of bin-aural hearing aids and directional microphones under different levels ofreverberation[J].J Speech Hear Disord,1984,49:278.

6 Kates J,Weiss M.Acomparison of hearing aid array-processing tech-niques[J].J Acoust Soc Am,1996,99:3 138.

7 Nabelek AK,Mason D.Effect of noise and reverberation on monauraland binaural word identification by subjects with various audiograms[J].J Speech Hear Res,1981,24:375.

8 Nejime Y,Moore BC.Evaluation of the effect of speech-rate slowingon speech intelligibility in noise using a simulation of cochlear hearingloss[J].J Acoust Soc Am,1998,103:572.

9 Nilsson M,Soli SD,Sullivan J.Development of a hearing in noise testfor the measurement of speech reception threshold[J].J Acoust SocAm,1994,95:1 085.

10 Peterson P,Wie S,Rabinowitz W,et al.Robustness of an adaptivebeamforming method for hearing aids[J].Acta Otolaryngol Suppl,1990,469:76.