Superdirectional microphone arrays
Acoustic signal processing for telecommunication
Signal processing in high-end hearing aids: state of the art, challenges, and future trends
EURASIP Journal on Applied Signal Processing
Database of multichannel in-ear and behind-the-ear head-related and binaural room impulse responses
EURASIP Journal on Advances in Signal Processing - Special issue on digital signal processing for hearing instruments
Signal separation by integrating adaptive beamforming with blind deconvolution
ICA'07 Proceedings of the 7th international conference on Independent component analysis and signal separation
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Interference signals which superimpose the desired speech signals are a severe problem for hearing impaired people, since they suffer from a reduced speech intelligibility which cannot be completely compensated by an increase of the input signal level with hearing aids. Directional signal processing with beamformers and noise reduction try to increase the speech intelligibility by enhancing the signal-to-noise ratio for the disturbed input signals.In this contribution, first differential beamformers are described and analysed under the consideration of hearing aid constraints, such as the microphone distance and head shading effects. Differential beamformers are analysed, adaptation procedures are deduced and real-word hearing aid problems are addressed. Also, a performance analysis tool is described for the measurement of adaptive beamformers.In a second step, a combined noise reduction and hearing aid gain optimization procedure is presented which optimizes the speech intelligibility for hearing impaired persons under consideration of the hearing loss and the instantaneous signal-to-noise ratio of the ambient sound field.