摘要
针对次声波生成及定向技术展开研究。采用DDS技术通过电声转换实现了不同频率次声波的生成;应用声学参量阵,以两路超声波通过叠加,实现以超声波载波调制生成次生波。该方法可有效抑制旁瓣,使次声波主要集中在主轴方向,解决了次声波的定向传播问题,并通过仿真实验验证了该方法的可行性。
The paper focus on the generation and orientation of the infrasound wave.By using the DDS technology,the different frequencies of Infrasoundwave is generated through the electro-acoustic conversion method.The orientation of infrasound wave has been formed by the way of acoustic parametric arrays which take the advantage of two ultrasound superposition and modulation.The sidelobe can be effectively suppressd and the infrasound wave can be centralized in the axial direction by the method so that transmission and orientation of the infrasound wave can be resolved.The feasibility of this method can be verified by the simulation experiment.
出处
《西安理工大学学报》
CAS
北大核心
2012年第3期356-360,共5页
Journal of Xi'an University of Technology
关键词
次声波
定向
DDS
仿真
声学参量阵
infrasound
orientation
DDS
simulation
acoustic parametric arrays