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In order to reduce interfering signal components for hearing aids, a complete noise reduction system is described which consists of monaural and binaural beam-formers and a single channel noise reduction for further enhancement. Firstly, the monaural part combines the two or three microphones of each side of the head to adaptively suppress non desired sources outside the line of sight. Secondly, binaural...
This paper is intended to give an overview of problems of hearing impairment and audio signal processing in hearing aids. First, the physiological requirements due to hearing impairment are explained and different hearing aid types are demonstrated. The main part of the paper is dedicated to present the different audio processing methods in modern hearing aids. Especially beamforming and noise reduction...
The development of hearing aids incorporates two aspects, namely, the audiological and the technical point of view. The former focuses on items like the recruitment phenomenon, the speech intelligibility of hearing-impaired persons, or just on the question of hearing comfort. Concerning these subjects, different algorithms intending to improve the hearing ability are presented in this paper. These...
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