Abstract

There are more than 2000 air blowers and compressors in Québec and their number is growing rapidly, This pumping device is a necessary piece of equipment for transferring dry bulk materials or for various public works. Called “blowers” or “vacuums”, these machines generate noise levels varying from 90 dB to 105 dB. The traditional solutions for noise reduction could not be applied to these devices. The researchers therefore worked on improving the design of this equipment in collaboration with the manufacturer Hibon. Theoretically, they developed software that used vibration measurements to predict structure-radiated noise. Practically, they developed a hybrid silencer consisting of a dissipative module of original design paired with a standard dissipative module, which absorbs and reduces the port noise by 10 dB(A). A software program and a design guide for booster silencers were also developed.