MicrodB, the LAUM (Acoustical Laboratory of the Université du Maine) and the LVA (Laboratory of Vibration and Acoustics) published together in the Journal of the Acoustical Society of America (JASA).
“Instantaneous Bayesian regularization applied to real-time near-field acoustic holography” presents MicrodB’s recent technological developments, making it possible to reconstruct non-stationary acoustic sources (closing doors, rotating sources, transitory phenomena) using acoustic imagery. The origin of this work comes from the fact that the classical beamforming method provides limited spatial resolution, especially at low frequencies. The method presented developed by the Acoustical Laboratory of the Université du Maine involves real-time near-field holography, which reconstitutes both evanescent and propagative acoustic field components, significantly improving results obtained by the beamforming method.
The main scientific development is to have solved the inverse problem by using a Bayesian approach. This approach has proven to significantly increase the method’s stability. The method is also enhanced to allow the reconstruction of long signals.