Acoustic systems often use circular pistons to radiate sound into fluid media. Mathematically, the solution to the radiation impedance of a baffled circular piston is well known. Implementing the exact solution in circuit analysis packages, such as SPICE, however, can be difficult because many commercial packages do not include Bessel and Struve functions. A SPICE subcircuit is presented that calculates the radiation impedance for all frequencies to a good approximation.

Authors: Porter, Scott; Thompson, Stephen
Affiliation: Applied Research Laboratory, The Pennsylvania State University, State College, PA, USA
AES Convention: 127 (October 2009) Paper Number: 7844
Publication Date: October 1, 2009
Subject: Transducer Modeling and Design

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