Use of sound insulation acoustic enclosures junction noise source (the noise machinery and equipment) to cover in a small space, so that the noise rarely coming out of a noise control measures. The shape of the acoustic enclosures often designed to outline close to the sound source, and as far as possible close to the sound source to install, and make it smaller in size, lower cost. 

 Very wide application of sound-absorbing acoustical enclosures, fans, pumps and other types of sound source equipment source treatment will be applied to this sound insulation and sound-absorbing products. Its main design principle is effective and some control of noise sources from the acoustic propagation path Because the external dimensions of each sound source equipment, ventilation and heat dissipation requirements, so often it needs to live sound source design and processing production. 
 In order to ensure adequate sound insulation, acoustic enclosures will normally be 0.5-2mm galvanized steel, aluminum and other metal materials, sometimes coated with 3-5mm damping coating material to reduce the metal outer wall of the resonance in the inner wall will require or standing wave phenomenon; wall of the inner acoustic enclosures are perforated plates overlying sound-absorbing material, such as structure, or directly paste the polyester type of sound-absorbing material. 
 Structure 

 The principle of acoustical enclosures, noise source is enclosed in a small space in order to reduce the radiation noise envelope. Therefore, the overall structure of the acoustic enclosures must be designed according to the structure of the sound source device, and in particular, fixed shape or structure. 
 Generally speaking, the need to design, light weight, good sound insulation performance of the composite structure, acoustic enclosures must also attach a high absorption coefficient of sound absorption lining and so on. According to some special equipment features also such as isolator, double seal structure, with the vent structure, plus the ventilation tube structure of the sound-absorbing material. 
 Design points 

 Acoustical enclosure noise reduction effect is widely used in noise control engineering, design and selection of acoustic enclosures should note the following: 

 1, the radome must have adequate sound insulation, and in order to facilitate the manufacture of installation and maintenance, should be 0.5-2mm thick steel or aluminum thin and dense material. 
 2, steel or aluminum and other lightweight materials for radome, be on the wall reinforcement, coating paste the damping layer, to suppress and weaken the resonance and consistent settles. 
 Between the equipment and seat cover body and the sound source can not have a rigid contact, in order to avoid the formation of a "sound bridge, resulting in lower sound insulation. At the same time, acoustic enclosures and the ground between the formation of isolation in order to reduce the solid sound. 
 4, open sound-proof doors and windows, ventilation and cable pipeline crevice must be sealed and pipelines around the damping and sealing measures. 
 Hood to add acoustic treatment, the use of porous loose material should be a solid surface protection layer. 
 6, the casing in the form appropriate to minimize the use of the square parallel to the shield wall, to prevent the standing wave effect of the air the sound of the hood, at the same time, left a large space between the shield wall and equipment, generally on space, a / 3 more than the spatial distance of the inner wall surfaces and equipment shall not be less than 10cm, so as to avoid coupling resonance, so that the sound transmission loss is reduced. 
 7, machinery and equipment when the quilt temperature rise need to be taken in the ventilation and cooling measures should be measures to increase the muffler, muffler with insertion loss of acoustical enclosures to match. 
 Industrial noise reduction device and noise processing system 

 Structure: points fixed, removable, according to the noise reduction requirements, site conditions and price options. 

 Specific applications: acoustic enclosures for all kinds of fans, air compressors, motors, electric saws, air-conditioning device noise, compact structure, easy to assemble every muffler effect good. 

 Effect: the amount of noise reduction of 18-25 dB (A) above. 

 For ventilation fans and piping noise control. The quiet room is structured as follows: