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Abstract-This contribution deals with sound source direction estimation in the three-dimensional space. An energetic analysis method based on B-format signals processing is presented in this paper. This method is able to estimate the direction of arrival for multiple sound sources in the three dimensional space. A single SoundField microphone can be used to pick-up B-format signals indirectly. The method has been simulated in Matlab and tested in a real environment. Experimental results demonstrate the validity of this method.

Abstract-Non-stationary harmonic signals cannot be accurately represented by Fourier transform (FT). Fortunately, several methods for representing non-stationary harmonic signals exist including Fan-Chirp trasnform (FChT) or Harmonic transform (HT). This article is focused on the Harmonic transform and its computation. Estimation of slope of fundamental frequency change between analysed segments is essential for computation of the HT. The slope is estimated using several realisations of HT and comparing the spectral flatness. Optimisation of this procedure is presented in the article.

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