基于等效源法的单全息面声场分离机理及技术
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TB52

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国家自然科学(51665006);广西汽车零部件与整车技术重点实验室自主研究课题(2017GKLACVTZZ01)


Research on mechanism and technique of single hologram plane sound field separation based on equivalent source method
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    摘要:

    声场分离是实现声场精确重建的一种前处理技术。为改进双全息面分离声场技术采用的测点数目多、分离精度受两全息面之间距离影响等问题。提出一种等效源法的单全息面声场分离方法。利用空间变换的声全息技术识别出声源的大致位置,结合等效源法中声压和法向振速之间的关系,建立起声压和法向振速的分离公式。仿真分析了脉动球作为干扰源的分离结果,结果表明,该方法具有较好的分离精度。可见该方法能在单测量面下实现多相干声源声场的有效分离。

    Abstract:

    Sound field separation is a kind of pre-processing technology to achieve accurate sound field reconstruction. In order to improve the two hologram plane separation technology, there are many points and the separation accuracy is affected by the distance between the two hologram planes. A single hologram field separation method on equivalent source method is proposed. The approximate location of the near field sound holography technology of space transformation, and the separation formula of sound and normal vibration velocity is established by combining the relationship between sound pressure and normal vibration velocity in the equivalent source method. The separation results of pulsating ball as a sound source are simulated and analyzed. The results show that this method has a good separation accuracy. It is seen that this method can realize the effective separation of multiple coherent sound sources under a single measurement surface.

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伍松,郑贤,赵鑫,等. 基于等效源法的单全息面声场分离机理及技术[J]. 科学技术与工程, 2023, 23(30): 12874-12882.
Wu Song, Zheng Xian, Zhao Xin, et al. Research on mechanism and technique of single hologram plane sound field separation based on equivalent source method[J]. Science Technology and Engineering,2023,23(30):12874-12882.

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历史
  • 收稿日期:2022-12-05
  • 最后修改日期:2023-07-20
  • 录用日期:2023-03-20
  • 在线发布日期: 2023-11-15
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