Hearing aid application of feedback cancellation algorithm in frequency domain

Abstract

핵심용어: 스마트 보청기, 피드백 제거, 주파수 영역 적응 필터, 정규 최소 평균 자승 기법, 스마트폰 원격 제어ABSTRACT: In this paper, the realization of a hearing aid adaptively cancelling feedback noise was considered. Conventional least mean square method in time domain was transformed into frequency domain in order to minimize computational burden. The adaptive filter algorithm was evaluated by Matlab (Matrix laboratory), and it was confirmed by CSR 8675 Bluetooth DSP IC (Digital Signal Processor Integrated Circuit) chip firmware realization. Some remote control features by a smart phone was added to the smart hearing aid for user interface easiness.