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One-Port Network Theory

The basic idea of a one-port network [526] is shown in Fig. 7.5. The one-port is a ``black box'' with a single pair of input/output terminals, referred to as a port. A force is applied at the terminals and a velocity ``flows'' in the direction shown. The admittance ``seen'' at the port is called the driving point admittance. Network theory is normally described in terms of circuit theory elements, in which case a voltage is applied at the terminals and a current flows as shown. However, in our context, mechanical elements are preferable.

Figure 7.5: A one-port network characterized by its driving point admittance $ \Gamma (s)$ . For any applied force $ F(s)$ , the observed velocity is $ V(s) = \Gamma (s)F(s)$ .
\includegraphics[scale=0.9]{eps/loneport}



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``Physical Audio Signal Processing'', by Julius O. Smith III, W3K Publishing, 2010, ISBN 978-0-9745607-2-4.
Copyright © 2014-03-23 by Julius O. Smith III
Center for Computer Research in Music and Acoustics (CCRMA),   Stanford University
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