The measurement of the mechanical cardiac activity from the platform supporting the body is called ballistocardiography (BCG). Each time the heart beats, the acceleration of blood generates a mechanical impulse that can be measured and analyzed with a sensitive enough force sensor, such as the Beddit Sleep Tracker.
Throughout the night, Beddit picks up each individual heart beat and respiration cycle while separating other body movement from them. Our advanced analysis and machine learning algorithms adapt differently to each body type and provide detailed sleep each morning.
Paalasmaa, J., Toivonen, H. & Partinen, M., 2015. IEEE Journal of Biomedical and Health Informatics, 19(6), pp. 1945-1952.
Paalasmaa, J., Waris, M., Toivonen, H., Leppäkorpi, L. & Partinen, M., 2012 In 34th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC’12
Paalasmaa, J., 2014 PhD thesis. University of Helsinki