Developments in Direct-Field Acoustic Testing

作     者：Larkin, Paul 

作者机构：Maryland Sound Int Baltimore MD 21207 USA 

出 版 物：《SOUND AND VIBRATION》 (声与振动)

年 卷 期：2014年第48卷第11期

页      面：6-10页

核心收录：

学科分类：07[理学] 082403[工学-水声工程] 08[工学] 070206[理学-声学] 0802[工学-机械工程] 0824[工学-船舶与海洋工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

主　　题：Military aircraft Costs Control theory Controllers Control algorithms Random vibration 

摘      要：Direct-field acoustic testing (DFAT (R)) has been developing to include new control schemes, hardware geometry and setup parameters in an effort to improve sound pressure uniformity. In addition, research is being conducted into the modeling and control of standing waves created by either room geometry or wave interference patterns in the DFAT sound field. Control schemes that use additional microphones or accelerometers in conjunction with nonsymmetry in the geometry of the setup to reduce the magnitude of standing waves is discussed. It will also be shown how control microphone placement and the type of control scheme can also heavily influence the creation of standing waves.