無限大バルフに取付けられたピストンコーンの放射インピーダンス
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概要
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The objective of this paper is to obtain a radiation impedance of a conical shell of pistonic motion in an infinite baffle. Since it is difficult to evaluate reacting force of air to the shell surface analytically, an approximation method is applied in this study. The mathematical representation of the method is based on the Helmholtz integration equation. A numerical approach for an improper integration involved in the Helmholtz integral equation is defined. This method is based on an elliptic integration. The radiation impedances of some conical shills are obtained by the use of the present method. They differ significantly from that of a well-known circular plate of pistonic motion. Acoustical effects of the concave shape to the radiation impedance are clearly analyzed in this study.
- 社団法人日本音響学会の論文
- 1982-02-01