中文摘要：

扬琴是具有悠久历史的中国弹奏乐器，在民族乐队中占有重要的位置．但是迄今为止，其声功率级尚未予以测定．文中介绍了在混响室内采用多通道测试技术测量扬琴声功率及其动态范围的方法，获得了扬琴在不同演奏力度下演奏单音、音阶和乐曲时的典型声功率数值．文中建议扬琴的声功率用其以f力度演奏音阶时所辐射的声功率及其频谱来标识，扬琴声功率的动态范围用其以不同力度演奏音阶时所辐射的声功率的动态范围来标识．

英文摘要：

Yangqin is one of the most popular Chinese traditional instruments with a long history. Although it is an important regular musical instrument in Chinese music ensemble, its sound power level has not yet been determined. In this paper, the sound power level measurement of Yangqirt was performed in a reverberation chamber, and the sound output and the corresponding dynamic range were obtained by means of multi-channel measurement. The typical sound power levels of Yangqin were then obtained when performing single notes, music scales and a piece of folk music under pp, mp, f and ff dynamics, respectively. It is suggested that the forte sound power and its spectrum when performing a music scale under f dynamic can be chosen to represent the sound power of Yangqin, and that the sound power dynamic range of Yangqin can be specified by the range when performing a music scale under pp and ff dynamics.