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A novel approach to calibrate the geometry of microphones using a single sound event is proposed. A variant of the expectation-maximization algorithm is employed to estimate the spatial coherence matrix of the reverberant sound field directly from the microphone signals. By matching the spatial coherence to theoretical models, the pairwise microphone distances are estimated. From this, the overall...
A linearly constrained minimum variance (LCMV) beamformer aims to completely remove interference and optimize the signal-to-noise ratio (SNR). We examine an array geometry consisting of multiple sub-arrays. Our analysis shows that the increased intersensor distance typical of such setups is beneficial for the task of signal separation. Another unique feature of distributed arrays is the necessity...
As we are surrounded by an increased number of mobile devices equipped with wireless links and multiple microphones, e.g., smartphones, tablets, laptops, and hearing aids, using them collaboratively for acoustic processing is a promising platform for emerging applications. These devices make up an acoustic sensor network comprised of nodes, i.e., distributed devices equipped with microphone arrays,...
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