Orthogonalized power filters for nonlinear acoustic echo cancellation
Signal Processing
Robust distributed noise reduction in hearing aids with external acoustic sensor nodes
EURASIP Journal on Advances in Signal Processing - Special issue on digital signal processing for hearing instruments
Plane-wave decomposition of acoustical scenes via spherical and cylindrical microphone arrays
IEEE Transactions on Audio, Speech, and Language Processing
Model-based dereverberation preserving binaural cues
IEEE Transactions on Audio, Speech, and Language Processing - Special issue on processing reverberant speech: methodologies and applications
IEEE Transactions on Signal Processing
Binaural Noise Reduction Algorithms for Hearing Aids That Preserve Interaural Time Delay Cues
IEEE Transactions on Signal Processing
Spatial Aliasing in Spherical Microphone Arrays
IEEE Transactions on Signal Processing
Signal enhancement using beamforming and nonstationarity withapplications to speech
IEEE Transactions on Signal Processing
Reduced-Bandwidth and Distributed MWF-Based Noise Reduction Algorithms for Binaural Hearing Aids
IEEE Transactions on Audio, Speech, and Language Processing
Three-Dimensional Sound Field Reproduction Using Multiple Circular Loudspeaker Arrays
IEEE Transactions on Audio, Speech, and Language Processing
Spatial Multizone Soundfield Reproduction: Theory and Design
IEEE Transactions on Audio, Speech, and Language Processing
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Microphone arrays are used in speech signal processing applications such as teleconferencing and telepresence, in order to enhance a desired speech signal in the presence of speech signals from other speakers, reverberation and background noise. These arrays usually provide a single-channel output, so that no spatial information is available in the output signal. However, spatial information on the sound sources may increase the intelligibility of a speech signal perceived by a human listener. This work presents a mathematical framework for generalized spherical array beamforming that in addition to suppressing noise and reverberation, is aiming to preserve spatial information on the sources in the recording venue. The generalized beamforming, formulated in the spherical harmonics domain, is based on binaural sound reproduction where the head-related transfer functions are incorporated into a headphones presentation. The performance of the proposed generalized beamformer is compared to that of a single-channel output maximum-directivity beamformer. Listening tests with human subjects show that when the generalized beamformer is used the intelligibility is improved at low input SNRs.