Abstract: A ballistocardiography device comprises: a support for a person, a plurality of pressure or acceleration sensors each providing an analogue signal representative of a pressure or an acceleration measured at a point on the support or on the body of the person, a multiplexer (41) configured to receive a plurality of analogue signals from sensors and to output a signal successively representative of the input signals and an operational amplifier (52) having one input (57) connected to the output of the multiplexer and provided, on its other input, with a mixed filter comprising an analogue-to-digital converter (53) converting the signal coming out of the multiplexer into digital data, a digital filter (54) acting on the digital data and a digital-to-analogue converter (55) converting the filtered digital data into an analogue signal that is fed into the other input (58) of the operational amplifier.

Abstract: The ballistocardiography device (200) comprises: a non-homogeneous and anisotropic support (105) having a portion forming a stress or deformation guide (205) and a portion transmitting fewer stresses or deformations in the frequency range between 0.05 Hz and 25 Hz, and at least one sensor (210) of a signal representing at least one movement and/or variation of quasi-static stress of the guide in the frequency range between 0.05 Hz and 25 Hz, positioned facing the stress or deformation guide. The stress or deformation guide is on the surface.