Finite‐element equivalent circuits for acoustic field

An equivalent electrical circuit results from the process of representing a general three‐dimensional system approximately by the corresponding nondimensional discrete network. The equivalent electrical circuits for acoustic field problems are presented based on the finite‐element approach. Basic equivalent circuits are first developed for a triangular or tetrahedral acoustic element in which the pressure is assumed to change linearly within the element. The circuit of an arbitrary sound field can be obtained simply by connecting these basic elements. The lossy field and the boundary wall with an acoustic impedance are then considered.