振动体及其辐射场的近场声全息实验研究

Experimental research on vibrating objects and its radiation field using near-field acoustic holography

摘要: 本文介绍我们自行研制的空气中近场声全息成像实验系统。用这一系统对单个扬声器，双扬声器及振动圆板等声源及其辐射场进行了测量，获得一些有意义的结果.这些结果与理论分析和计算机模拟良好地符合，表明近场声全息可以作为研究振动及其辐射场关系的有效手段.

Abstract: This paper presents the Near-field Acoustic Holography (NAH) imaging system for airborne sound constructed in our own laboratory. Using the system we have measured the vibrating modes and the radiated fields of a single loudspeaker, duplex loudspeakers and a unbaftled disc, and gotten interesting results. These results tally with theoretical analysis and computer simulations, and indicate that NAH can be used to research the relation between the vibrating mode and its radiation field as an effective means.