Noise reduction from air intakes of compressors and blower fans

The noise radiated by from air intakes of compressors and blower fans is a source of noise for the territory of the enterprise and the surrounding area. The using of acoustic barriers and dissipative silencers for reducing noise from air intake of compressor and blower fans were analyzed. The effect of the distance from the acoustic barrier to the air intake on the reduction of noise and changing the aerodynamic drag were investigating. It is detected the region of using acoustic barriers to reduce noise from air intake of compressors and from air intake of blower fans. The baffle silencers should be used when the noise reduction more 8-9 dBA. The baffle silencers have a high acoustic efficiency, but create additional aerodynamic drag. It stressed that the air intake design plays an important role in the aerodynamic drag of the air path. The case of reconstruction was shown, when the air channel with improved aerodynamic air intake and the silencer has less aerodynamic drag then the air channel without silencer before reconstruction. This is achieved by the implementation of the air intake structure. The results of acoustic measurements of the baffle silencer are shown.