The types of noise from gas turbine generator set are listed. It has been pointed out that

not only the effects of the noise around gas turbine enclosure on operational persons

but also the noise pollution from the equipment mounted on the roof of gas turbine enclosure upon the surrounding residence

should be controlled

Based on the measured data

the frequency change of each noise source and its distribution are expressed with curves of frequency spectrum

and the common characteristics of different noise sources are found. By studying the particular frequency change of each noise source

the mechanism of noise was thoroughly understood

so the typical features were grasped and a local control scheme and precautions had been proposed

By summing up all the local control measures

an overall control move for noise was presented

decreasing effectively the cost for lowering the noise level.