Considering the measured spectrum and APU equipment,a microporous muffler is used for reducting of APU exhaust noise. The measured results show that the effect of microporous muffler for noise reduction of APU exhaust is very satisfactory.

• 通过试验比较,表明采用微穿孔板消声器降低MA60飞机APU排气噪声的效果是非常理想的。