![]() Escabí PhD, in Introduction to Biomedical Engineering (Second Edition), 2005 10.1 INTRODUCTIONīiological signals, or biosignals, are space, time, or space–time records of a biological event such as a beating heart or a contracting muscle. ![]() These include signal averaging, wavelet analysis, and artificial intelligence techniques. In addition to these common procedures, sophisticated digital processing methods are quite common and can significantly improve the quality of the retrieved data. ![]() These techniques are generally accomplished with simple electronic circuits or with digital computers. Basic methods of signal analysis, such as amplification, filtering, digitization, processing, and storage, can be applied to many biological signals. Following data acquisition, biological signals are analyzed in order to retrieve useful information. Biosignals, therefore, contain useful information that can be used to understand the underlying physiological mechanisms of a specific biological event or system and that may be useful for medical diagnosis.īiological signals can be acquired in a variety of ways-for example, by a physician who uses a stethoscope to listen to a patient's heart sounds or with the aid of technologically advanced biomedical instruments. The electrical, chemical, and mechanical activity that occurs during this biological event often produces signals that can be measured and analyzed. ![]() Monty Escabí PhD, in Introduction to Biomedical Engineering (Third Edition), 2012 11.1 Introductionīiological signals, or biosignals, are space, time, or space-time records of a biological event such as a beating heart or a contracting muscle. ![]()
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