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Microphone Arrays: Signal Processing Techniques and Applications

Microphone Arrays: Signal Processing Techniques and Applications,M. S. Brandstein,D. B. Ward

Microphone Arrays: Signal Processing Techniques and Applications   (Citations: 254)
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Published in 2001.
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    • ...A quantity widely used for this purpose is the white noise gain (WNG), which is defined as the improvement in signal-to-noise ratio (SNR) of the array output compared to the SNR of individual microphones for white Gaussian noise [22], [23]...

    Enzo De Senaet al. On the Design and Implementation of Higher Order Differential Micropho...

    • ...A microphone array is a device that samples a soundfield at multiple spatial locations, and whose output can be combined using a linear filterbank called a beamformer [1].,Adaptive data-dependent beamformers continually optimize their design based upon the signal and noise conditions [1]; in contrast, time-invariant beamformers make prior assumptions about their operating environment.,Of the time-invariant approaches, superdirective beamforming [1] is desirable due to its ability to achieve high directivity with small apertures [2].,... Minimum Variance Distortionless Response (MVDR) beamformer can be designed for both time-invariant and adaptive cases by estimating the expected noise crosspower density to minimize the noise power at the beamformer output [3, 4]. Such designs can be sensitive to uncorrelated sensor self-noise and sensor mismatch, for which explicit constraints on the beamformer’s white noise gain have been shown to successfully reduce such effects [1]...

    Mark R. P. Thomaset al. Optimal 3D Beamforming Using Measured Microphone Directivity Patterns

    • ...Thus, in this paper, we propose a method of integrating channelwise SS with the automatic adjustment of the subtraction parameter and a minimum-variance distortionless response (MVDR) beamformer [18]; we call this method chSS MVDR...
    • ...DS [18]. Hence, it is expected that the proposed method can reduce musical noise, similarly to chSS DS...
    • ...where is a regulation term [18] consisting of a small value and an identity matrix ...
    • ...MVDR part. Generally, it is well known that MVDR approximately becomes DS in the case of spatially uncorrelated noise, which means that the noise is reduced on the basis of synchronized-addition [18]...

    Hiroshi Saruwatariet al. Musical Noise Controllable Algorithm of Channelwise Spectral Subtracti...

    • ...Many methods have been proposed to improve the robustness of the beamformer against DOA angle mismatch error [7], [8]...

    Yong Zhaoet al. Adaptive Wideband Beamforming With Frequency Invariance Constraints

    • ...Here, we focus particularly on the use of a beamformer for sound acquisition in reverber­ ant environments, where beamformers have shown particular promise [4]...

    Daniel P. Jarretttet al. Dereverberation performance of rigid and open spherical microphone arr...

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