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A note on a WKB application to a duct of varying cross-section

机译:关于WKB应用于截面不同的管道的说明

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摘要

In this paper, the two-dimensional problem of an incident plane sound wave traveling along a rigid duct or a rigid horn is studied. It has been shown that a simple one-dimensional analysis gives accurate predictions of the sound propagation. The impedance of a particular horn is obtained using the Wentzel-Kramers-Brillouin (WKB) approximation to solve the Webster equation. The mouth of the horn is assumed to be terminated in an infinite baffle. Computation of the normalized acoustic impedance using the WKB approach shows less floating point operations when compared with a Runge-Kutta algorithm. (C) 2001 Elsevier Science Ltd. All rights reserved. [References: 8]
机译:本文研究了入射平面声波沿刚性管道或刚性喇叭传播的二维问题。已经表明,简单的一维分析可以准确预测声音的传播。使用Wentzel-Kramers-Brillouin(WKB)近似值求解Webster方程可获得特定号角的阻抗。喇叭的嘴被认为以无限的挡板终止。与Runge-Kutta算法相比,使用WKB方法计算归一化声阻抗的浮点运算更少。 (C)2001 Elsevier ScienceLtd。保留所有权利。 [参考:8]

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