中文摘要：

笙是中国具有悠久历史的簧管乐器，在民族管弦乐队中占有重要位置，曾被誉为最受欢迎的中国管风琴。但迄今为止，笙的声功率级尚未予以测定。介绍了在混响室内对笙声功率级所进行的测试工作。由2位资深乐师分别用不同的笙在混响室中演奏，采用多通道实时分析技术测量笙的声功率级和动态范围，获得笙在不同演奏力度下典型的平均声功率级数值；详细介绍了24簧传统笙的声功率级测试过程，同时给出了高音键笙、低音抱笙和排笙的声功率级谱。

英文摘要：

Sheng is one of Chinese traditional wind instrument which has a history of over 3000 years. Known as the most popular Chinese pipe organ, Sheng plays an important role in the Chinese national orchestra. But its sound power level has never been carefully measured. The SWLs（Sound Power Levels） spectrum of Sheng is measured for the first time in a reverberation chamber. Two qualified musicians performe on their own instruments in the center of the reverberation chamber. The radiated sound energy and dynamic ranges of the Shengs are investigated by four-channel acoustic measuring equipments. Typical sound power values are obtained through averaging when melodies, music scale and single notes performed. The SWLs measurement of 24 reeds traditional Sheng is demonstrated in details, while the SWLs measurement results of other ameliorant Shengs are also given.