M.A. Omarov
DOI:
https://doi.org/10.30837/rt.2026.1.224.14Keywords:
microphone array, superposition, non-equidistance, Pearson correlation, correlation signal processing, correlation coefficient, matrixAbstract
The article describes the analysis of correlation dependencies between neighboring microphones in ring two-section gratings at distances corresponding to the near and intermediate zones. An algorithm is used in which each microphone is modeled by an isotropic emitter represented by a spherical wave function. The algorithm makes it possible to take into account the time delay of microphone signals, allows considering an arbitrary even and odd number of emitters located along the arc length both evenly and unevenly. Most of such tasks are based on estimating the position of the sound source based on signals received by microphones in the matrix, including cross-correlation methods.
The maximum correlation should correspond to the change in time of signals between microphones of interest in time.
The analysis of correlation dependencies showed the presence of the influence of microphone signals, which is consistent with the dependencies built on experimental dependencies.
Correlation fields and tabular results also indicate the possibility of obtaining an acceptable sound level with a smaller number of microphones involved. Analysis of correlation dependencies for different numbers of microphones on an array of distances corresponding to the middle and far zones contributes to the search for improvements in neural network algorithms.
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