Forbes, Barbara J.; Pike, E. Roy and Sharp, David B.
|DOI (Digital Object Identifier) Link:||http://doi.org/10.1121/1.1590314|
|Google Scholar:||Look up in Google Scholar|
The transformed form of the Webster equation is investigated. Usually described as analogous to the Schrödinger equation of quantum mechanics, it is noted that the second-order time dependency defines a Klein–Gordon problem. This "acoustical Klein–Gordon equation" is analyzed with particular reference to the acoustical properties of wave-mechanical potential functions, U(x), that give rise to geometry-dependent dispersions at rapid variations in tract cross section. Such dispersions are not elucidated by other one-dimensional—cylindrical or conical—duct models. Since Sturm–Liouville analysis is not appropriate for inhomogeneous boundary conditions, the exact solution of the Klein–Gordon equation is achieved through a Green's-function methodology referring to the transfer matrix of an arbitrary string of square potential functions, including a square barrier equivalent to a radiation impedance. The general conclusion of the paper is that, in the absence of precise knowledge of initial conditions on the area function, any given potential function will map to a multiplicity of area functions of identical relative resonance characteristics. Since the potential function maps uniquely to the acoustical output, it is suggested that the one-dimensional wave physics is both most accurately and most compactly described within the Klein–Gordon framework.
|Item Type:||Journal Article|
|Academic Unit/Department:||Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
|Depositing User:||David Sharp|
|Date Deposited:||06 Jun 2006|
|Last Modified:||02 Aug 2016 12:52|
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