针对船舶机舱内机械噪声大，高压流体泄漏不易被察觉的问题，提出一种高频弱声源近场声全息方法。该方法运用经验模态分解法，经过计算使各阵元时域采样信号乘上权值，再利用结合压缩感知技术的平面等效源近场声全息方法重构近场平面声压分布。仿真实验表明，该方法性能可靠且具有较强的抗噪能力，可作为船舶机舱内低信噪比条件下的高频弱声源近场声全息方法的一种有效补充。
Aiming at the problem of large mechanical noise in the cabin and the high-pressure fluid leakage was not easily detected, a near-field acoustic holography method for high-frequency weak acoustic sources was proposed. The method used empirical mode decomposition method to multiply the time domain sampled signals of each array element by weights, and then reconstructed the near-field plane sound pressure distribution by using plane equivalent source near-field acoustic holography combined with compressive sensing. The simulation experiment showed that the method was reliable and had strong anti-noise ability, which could be used as an effective complement to the near-field acoustic holography method of high-frequency weak sound sources under low signal-to-noise ratio in ship cabin.
2019,41(11): 138-143 收稿日期：2018-05-14
DOI：10.3404/j.issn.1672-7649.2019.11.028
分类号：TB52
基金项目：国家自然科学基金资助项目（51705529），湖北省自然科学基金资助项目（2017CFB672）
作者简介：陈汉涛(1994-),男,硕士研究生,主要从事振声监测方面的研究
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