Biosignals analysis (heart, phonatory system, and muscles)

© 2022 Elsevier Inc. All rights reserved.The analysis of a system starts by identifying the inputs and outputs of the phenomena under study. If the system is visualized as a complex object collection, whose parts or compounds interacting together to achieve an objective, then the more information about its parts we have, the better we can understand it. In the field of biomedical engineer, the physical phenomena that give information about the systems of interest are naturally biological. The main goal of a bio-engineer is to study these signals to solve a medical problem, to increase the understanding about it or, to improve the way diagnosis is done. Nowadays, the field of medical data processing is experiencing rapid expansion. This is due to the advances in integrated circuits, technology, software engineer and the increasing computational tools based in numerical methods and artificial intelligence. This chapter presents the physiological principles of biosignals and their relationship with the way they are measured. Also, an explanation about the electrophysiological basis and the transducers, as well as the instrumentation system used to record them can be found in every section.