Why do we compute the spectra?
Mechanisms underlying biological phenomena are often understood on the basis of equivalent electric circuits. An effective way of probing a biological system is to measure a signal which is a reflection of the phenomena and to analyze it according to the conventional recipe, for instance, the spectrum analysis. In this paper the meaning of spectrum analysis of a biological signal is briefly discussed in connection with linear system identification. Wiener analysis of a non-linear system is also mentioned.
Sato
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Department of Biophysical Engineering, Faculty of Engineering Science, Osaka University, Japan.
D004553:Electric Conductivity; D004562:Electrocardiography; D004569:Electroencephalography; D004576:Electromyography; D004594:Electrophysiology