Shahab Pasha Jan Lundgren Christian H. Ritz Multi-Channel Electronic Stethoscope for Enhanced Cardiac Auscultation using Beamforming and Equalisation Techniques. 1289-1293 2020 EUSIPCO https://doi.org/10.23919/Eusipco47968.2020.9287636 conf/eusipco/2020 db/conf/eusipco/eusipco2020.html#PashaLR20