According to the noise source, through vibration isolation, sound absorption, noise elimination, sound insulation and other measures, the impact of the unit on environmental noise is reduced to the standard of environmental noise in urban area. Vibration isolation: by means of vibration isolation measures, the vibration source is isolated from the environment by the damping device, which can effectively suppress the solid sound. Sound absorption: when sound wave encounters various substances in the process of propagation, part of sound energy is reflected and part of sound energy is absorbed. Through the absorption of sound energy, the reverberation in the computer room is reduced, so as to achieve the effect of overall noise reduction. The noise level of the generator set is generally 90dB. When installed in the machine room with smooth side, the noise level in the machine room can reach 103 ~ 105dB. Therefore, the supplier of stainless steel muffler makes sound absorbers around the walls and ceiling of the machine room to absorb some sound energy and reduce the reverberation caused by acoustic reflection. Silencing: when acoustic wave is incident on porous materials, it will cause the air movement of pores or fibers. The air near the hole wall or fiber surface will produce viscous effect due to the influence of pore wall, which will cause friction between acoustic wave and porous material, so that the acoustic energy can be converted into heat energy and be attenuated. The engine room is a relatively closed environment. The inlet and outlet of stainless steel muffler company are used as damping muffler to reduce noise leakage. The noise reduction capacity of muffler can reach 25dB / m. Sound insulation: in the process of sound wave propagation in the air, due to the diffusion and obstruction of obstacles, the influence of sound energy is limited near the sound source, so as to block the noise source, such as sound insulation doors and windows, etc.