摘要
近场声全息对测量环境的严格要求限制了它在工程实际中的应用,特别是利用互谱法求解全息面声压时,参考信号的获取极为关键。针对有多个噪声源同时存在的复杂声场环境,提出一种工程解决方法,利用振动信号和声源出口处的信号作为近场声全息的参考信号,在传递函数法的基础上推导出全息面上分离的复声压,由此达到复杂声场环境下的近场声全息重建,仿真和试验证明了该方法的有效性。
The strict demand of the measurement environment by the near-field acoustic holography （NAH） limits the application of NAH in engineering. Especially, reference signals are important in calculating pressure on hologram. An engineering method was presented for near-field holography used in complicated sound environment. Based on the transfer function method, a vibration or sound signal with little contamination of other source was used as a reference signal to separate the target sources. Thus the reconstruction of the target sound field could be fulfilled. The method was proved to be effective by the numeric simulations and experiments.
出处
《海军工程大学学报》
CAS
北大核心
2011年第4期80-83,共4页
Journal of Naval University of Engineering
关键词
近场声全息
复杂声场
传递函数
near-field acoustic holography
complex sound field
transfer function
