Journal ArticleDOI
Simulating the response of multiple microphones to a single acoustic source in a reverberant room
TLDR
Using this "low-pass impulse" method, reverberant rooms can be simulated with sufficient accuracy to investigate multiple-microphone systems that are sensitive to interchannel phase.Abstract:
A method is presented for simulating the impulse response between an acoustic source and multiple microphones in a reverberant room. The method is similar to the image method described by Allen and Berkley [J. Acoust. Soc. Am. 65, 943–950 (1979)] but includes modifications to simulate received echo arrival time accurately. The essential modification is to represent each received echo as a low‐pass‐filtered impulse at the correct arrival time. Using this ‘‘low‐pass impulse’’ method, reverberant rooms can be simulated with sufficient accuracy to investigate multiple‐microphone systems that are sensitive to interchannel phase.read more
Citations
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Journal ArticleDOI
Convolutive blind separation of non-stationary sources
Lucas C. Parra,Clay D. Spence +1 more
TL;DR: This work tackles the problem of source separation by explicitly exploiting the nonstationarity of the acoustic sources, and finds an FIR backward model, which generates well separated model sources.
Journal ArticleDOI
GSVD-based optimal filtering for single and multimicrophone speech enhancement
Simon Doclo,Marc Moonen +1 more
TL;DR: Simulations show that the GSVD-based optimal filtering technique has a better performance than standard fixed and adaptive beamforming techniques for all reverberation times and that it is more robust to deviations from the nominal situation, as, e.g., encountered in uncalibrated microphone arrays.
Journal ArticleDOI
Prediction of energy decay in room impulse responses simulated with an image-source model
TL;DR: The technique presented in this work enables designers to undertake a preliminary analysis of a simulated reverberant environment without the need for time-consuming image-method simulations.
Single- and multi-microphone speech dereverberation using spectral enhancement
TL;DR: Novel single- and multimicrophone speech dereverberation algorithms are developed that aim at the suppression of late reverberation, i.e., signal processing techniques to reduce the detrimental effects of reflections.
Journal ArticleDOI
Performance of time-delay estimation in the presence of room reverberation
TL;DR: Synthetic microphone signals generated with the image model technique are used to study the effects of room reverberation on the performance of the maximum likelihood estimator of the time delay, in which the estimate is obtained by maximizing the cross correlation between filtered versions of the microphone signals.