中文摘要：

对NXT技术的分布式平板扬声器和集中参数扬声器的频响和指向性等进行了对比测量，通过对组合平板扬声器的声场研究及有源消声实验，证明了平板扬声器用于有源噪声控制的可行性。综合平板扬声器和集中参数扬声器的物理特点和声场特性，根据基于平面声源有源噪声控制的已有的理论研究结果和本文的实验结果，可以认为，NXT平板扬声器适合作有源噪声控制的次级源，有利于有源噪声控制的工程推广应用。

英文摘要：

In this paper, the characteristics of the sound field are compared between the flat panel loudspeaker and the lumped parameter loudspeaker by experimental investigation. It is proven that the flat panel loudspeaker can be used into active noise control by the study of sound field of the combination of the flat panel loudspeaker and the active noise control experiment. According to the characteristics of their physical and sound field of these two kinds of loudspeakers and the theoretical results of active noise control based on flat panel loudspeaker, it is shown that the flat panel loudspeaker is suitable than the lumped parameter loudspeaker when used as the secondary sound source in active noise control.