The air compressor is also a large amount of a wide range of general machinery products, widely used in machinery, mining, metallurgy, chemical industry and construction sectors. It produces high noise level, the impact of wide, has also become one of the major noise source endangering the health of workers and pollute the environment. To solve the air compressor noise problems from the manufacturing sector can further improve product quality and competitiveness in terms of the user departments to resolve the air compressor noise problems, and can greatly contribute to improving the environment and reduce the hazards of the workers affected by noise. 
 The air compressor noise control, and now has also been more mature way to control it. 
 Air compressor noise is airflow noise (mainly through into the exhaust port, external radiation), the mechanical moving parts impact, the mechanical noise generated by the friction of noise generated by the motor or some oil machine. 
 General fixed displacement compressor periodically into the exhaust caused by aerodynamic noise is the main component of the overall noise. This noise is generally higher than the mechanical noise levels are 5 ∽ 10dBA. For reciprocating compressors (positive displacement). Speed ??is low, the overall noise is generally low frequency; screw compressors (positive displacement), high speed, noise and were, high-frequency; by diesel driven portable compressors, diesel The noise is the main noise source, the noise is generally lower, intermediate frequency, and its noise level is far more than the noise of the compressor itself. 
 In China, the mobile displacement 6, 9, 12 m 3 / min and fixed L 10, 20, 40 m 3 min six products in various factories and enterprises a wide range of applications. Therefore considered to solve the noise problems of these six products, air compressor noise problems will be solved to a certain extent. Of course, the effective noise control measures applied in these six products, but also fully applicable to other displacement compressor, and the same can lead to satisfactory results. 
 Not to add noise reduction measures, a fixed L-type reciprocating air compressor (displacement 10, 20, 40 m 3 / min), one meter away from the unit, the noise level of 88 ∽ 95dBA; Screw Compressors (displacement of 10 20 m 3 / min), one meter away from the unit, the noise level of 95 ∽ 105dBA; mobile air compressor (displacement 6, 9, 12 m 3 / min), 1 m away from the unit, the noise average of 100 ∽ 105dBA. 
 Acoustic enclosures and mufflers will play a significant role in reduction of air compressor noise. Of course, the more prominent vibration unit, isolation measures should also be taken.