Valentin Baron - Doctorant - MicrodB

Numerical and experimental assessment of functional beamforming for source quantification

Functional Beamforming is an advanced sound source localisation method which improves both spatial resolution and dynamic range compared to conventional beamforming. While it is clear that localisation results are outperformed, uncertainty remains about quantification performances. This presentation evaluates the quality of the identified acoustic power as a function of the exponent parameter nu. Simulated test cases are set to evaluate the robustness of the method against uncorrelated noise, propagation model errors and extended sources. Then experiments in a controlled environment are carried out to confirm the trends observed previously. Conclusions are that model errors are critical even for low nu which makes this method not suited for quantification studies. However the method is more robust against uncorrelated added noise.