Shandong fan muffler muffler fan base [] professional manufacturers Tel: 15066595060 to managers based on the spectral characteristics of various fan run site industrial noise source for the actual test data obtained to determine spectral range within which require much volume as the design of sound absorption silencer mainly based on the body and the fluid channel, while using the narrow rectangular channel having a large absorption material finishes to enhance absorption. Also, the fan noise source at the maximum noise level, its value is often more than one spectrum, but for different spectral bands, their volume requirements are not the same muffler. For this reason GF series ventilation pipe and drum Fan silencers are impedance muffler sound flow pattern, with a high, medium frequency noise from the muffler sound-absorbing structure and the role of the resistance of the low frequency noise from the muffler sound reduction effect of anti- type structure, while the resistance-type channels using a high frequency and low frequency acoustic muffler area, to maximize the widened band muffler, the muffler in order to achieve good noise reduction. GF series ventilation ducts fan muffler and muffler drum Fan suitable for all types of centrifugal, axial flow, blower and air compressor.