Background noise reduction for hearing aids by adaptive beamforming method

• Main Authors: Guo-Yang Li, 李國揚
• Other Authors: Cheng-Chi Tai
• Format: Others
• Language: zh-TW
• Published: 2000
• Online Access: http://ndltd.ncl.edu.tw/handle/87740520259568903126

碩士 === 國立成功大學 === 電機工程學系 === 88 === Background noise reduction for hearing aids by adaptive beamforming method Guo-Yang Li* Cheng-Chi Tai** Department of Electrical Engineering National Cheng Kung University,Tainan Taiwan R.O.C Abstract Traditional hearing aids amplify all sounds without discriminating between the desired speech and the background noise. Hearing aid users are always harassed with the background noise. The system, based on the constrained adaptive beamformer described by Griffiths and Jim, adapts to preserve speech signal from straight ahead and minimize background noise arriving from other directions. A real time implementation of the Griffiths-Jim beamformer was achieved with a TMSC3x DSK and some other analog integrated circuits. The evaluation employ a real time hardware implementation and are restricted to the case of a single background noise. Performance is measured by comparison of the speech signal and the background noise amplitude. Results show that the background noise at declined by 62% compare with the speech signal. * the author **the advisor