Technique on noise powerspectrum of aeroengine test is introduced, noise level, primary noise source and characters with the technique of noise powerspectrum of turboprop are discussed.

• 通过讨论航空发动机试车台噪声的声功率谱分析技术，对某型涡轮螺旋桨发动机试车噪声的声功率谱进行分析，讨论该型发动机的噪声级、主要噪声源及其特征；