Localization of the sound source using microphone arrays is largely done by Acoustical Holography or Beamforming method. In this paper we present an implementation of DelayAnd-Sum algorithm for beamforming computation using various microphone arrays. A MATLAB code was implemented for postprocessing of obtained acoustic signals. There is also included a description of the fractional delay filter implementation to delay the signal samples by racional values of sample period. The goal of this paper was comparing the accuracy of the source localization with the microphone arrays using small number of microphones. The results of the localization of several noise sources by the different types of arrays is presented.

This paper presents a method for sound source direction estimation called Energetic analysis method, and studies the influence of the localization of the signal in the time and the frequency domains on the accuracy of this method. The resolution in time-frequency domain differs depending on the used transform. Different transforms are used in this paper, namely short-time Fourier transform, zero-padding STFT, and Gabor transform.

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