【作者】 康鲁迪； 许镓航； 张益铭； 刘鹏；

【Author】 KANG Lu-di;XU Jia-hang;ZHANG Yi-ming;LIU Peng;Qingdao University of Technology;

【机构】 青岛理工大学；

【摘要】 实际水域中声源体积速度测量受混响干扰,进而影响互易测试的精度。论文基于等效源法,进一步引入粒子群优化算法,实现对混响声场中直达声的分离和声源体积速度的修正。与单纯的等效源法相比,所提方法可通过已知体积速度的声源,优化得到待测声源的最佳等效源布置,无须对边界位置进行精准测绘。采用有限元,对四种典型水域下进行数值验证,结果表明:混响对实际水域声场的干扰在低频段最为显著,混响声场与直达声场的声压级差高达25 dB;通过所提方法分离的直达声与自由场理论值在大部分频段内误差小于2.0 dB,有效去除混响噪声,对受混响影响的声源体积速度进行精确修正,提升互易测试精度。更多还原

【Abstract】 In practical aquatic environments,the measurement of sound source volume velocity is subject to interference from reverberation,which in turn affects the accuracy of reciprocity experiment.Building upon the equivalent source method,the paper further introduces the particle swarm optimization(PSO) algorithm to achieve the separation of direct sound in reverberant sound fields and the correction of sound source volume velocity.Compared to the equivalent source method alone,the proposed approach can optimize the optimal arrangement of unknown equivalent sources for a given sound source with a known volume velocity,eliminating the need for precise mapping of boundary positions.Numerical validation is conducted using finite element analysis in four typical aquatic scenarios.The results indicate that reverberation interference in the sound field of practical aquatic environments is most pronounced in the low-frequency range,with sound pressure level(SPL)differences between the reverberant and direct sound fields reaching up to 25 dB.The direct sound separated by the PSO-ESQ method exhibits errors of less than 2.0 dB compared to the theoretical free-field values in most frequency bands,effectively removing reverberation noise and precisely correcting the sound source volume velocity affected by reverberation,thereby enhancing the accuracy of reciprocity testing.更多还原