中文摘要：

介绍了在混响室内参照ISO标准和国家标准对琵琶声功率的测量研究工作．由两位资深乐师用两把不同的琵琶在混响室中分别以pp，mp，f，ff四种力度演奏三个代表性的单音A，a^1与e^3、音阶和乐曲，采用4通道实时分析技术测量琵琶1／3倍频带声压级，通过平均、计算，获得琵琶在不同演奏力度下演奏不同内容时的典型平均声功率级和动态范围，并建议采用琵琶在f力度下演奏音阶时的平均声功率级作为其声功率的代表数值．

英文摘要：

Sound power level （SWL） measurements of the Pipa were performed in a reverberation chamber according to ISO standard and Chinese national standard. Two qualified musicians performed on two different Pipas in the chamber. While the sound pressure levels of 1/3 octave bands were recorded and analyzed by means of 4-channel real-time analysis. Typical values of the radiated sound power levels of Pipa when 3 representative single notes A, a^1 and e^3, a music scale and a folk song were performed at four dynamic levels （pp,mp,f and if） were obtained through averaging. The forte sound power level of performing a scale is suggested as the most representative value of the sound power level of the Pipa instrument.