平面近场声全息重建结果不准确性问题的研究

Study on inaccurate problem of reconstruction result by planar near-field acoustical holography

平面近场声全息作为一种有效的声场分析方法被广泛用于声场分析和振动体的振动模态及其辐射声场的研究。在介绍了平面近场声全息理论的基础上,指出了利用该方法进行声场重建时存在质点振动速度和声强重建不准确的问题,并从理论分析和模拟计算两个方面给予了证明,在此基础上进一步分析了该方法的应用局限性。

As an efficient and powerful way of sound field analysis, the planar near-field acoustical holography (NAH) has been widely applied to study the sound field and the vibration modes and radiating field of vibrating object. Based on introduction of the basic theory of planar near-field acoustical holography, the inaccurate problem of the particle velocity and sound intensity reconstruction by using the Planar NAH method is presented. The theoretical analysis and the simulation calculation have been done for demonstrating the problem, furthermore the limitation of the planar NAH is discussed.