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。提出了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声源的分离结果,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。
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,the number of measuring points is large and the separation accuracy was affected by the distance between the two hologram planes.A single hologram field separation method based on equivalent source method was proposed.The approximate location of sound source was identified by near field sound holography technology of space transformation,and the separation formula of sound and normal vibration velocity was 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 the method has a good separation accuracy.It can be seen that this method can realize the effectively separate the sound field of multiple coherent sound sources under a single measurement surface.
作者
伍松
郑贤
赵鑫
李常虎
WU Song;ZHENG Xian;ZHAO Xin;LI Chang-hu(School of Mechanical and Automotive Engineering,Guangxi University of Science and Technology,Liuzhou 545006,China;Guangxi Key Laboratory of Automobile Component and Vehicle Technology(Guangxi University of Science and Technology),Liuzhou 545006,China)
出处
《科学技术与工程》
北大核心
2023年第30期12874-12882,共9页
Science Technology and Engineering
基金
国家自然科学基金(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)。
关键词
等效源法
单全息面
多相干声源
声场分离
equivalent source method
single holographic plane
multiple coherent sound sources
sound field separation
