关键词: 声学, 等效源法, 单全息面, 声场分离, 重采样

Abstract:

The near-field acoustic holography can reconstruct the sound field with high resolution, but the condition is strict and is difficult to be satisfied in engineering. The method of sound field separation can virtual the free sound field ,so expand the application range of near-field acoustic holography.The The current method of sound field separation requires more prior knowledge of the sound source,and hindered the application of near-field acoustic holography to some extent. In this paper a new method of single holographic surface separation sound field based on the principle of acoustic equivalent source method is proposed. The sound field can be separated without the prior knowledge of target sound source and noise source. The theoretical derivation ensures the correctness of the method, and the numerical simulation verifies the feasibility of the method.