パラメトリック集束音源の簡易解析モデル

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概要

• 論文の詳細を見る

• The parametric interaction of two high frequency radiations in a focusing field produces a nonlinearly generated, difference frequency radiation that is also effectively focused. An analysis of this phenomenon, utilizing the parabolic approximation of the Helmholtz wave equation, has already been developed. The present paper presents another analytical model which makes the numerical computation much easier compared with the solution of the parabolic equation. The primary sound in the model is roughly assumed to be a spherical wave except in the focal region, where it is assumed to be a plane wave. The difference frequency sound pressure is obtained under the quasi-linear assumption by the volume integration of the radiation from the virtual sources, taking into account the diffraction effect at the difference frequency. The validity of the model is demonstrated through comparison to computed results of the parabolic approximation.

• 社団法人日本音響学会の論文

著者

• 斎藤 繁実

  Faculty of Marine Science and Technology, Tokai University

• トーマス G.ミュアー

  Applied Research Laboratories,The University of Texas at Austin

• トーマス G.ミュアー

  Applied Research Laboratories The University Of Texas At Austin

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