Basic methods to prevent and control environmental noise pollution: reduce the noise from the sound source; Reduce environmental noise pollution through common prevention and control measures and communication channels; Noise reduction measures shall be taken to protect the protected objects.

When dealing with noise, the disposal of sound source shall be considered first, and noise management shall be carried out. Reducing the noise emitted by the sound source can reduce the noise from the source. As long as the sound source is reduced by decibels, the indoor noise will be reduced by as much as decibels. You can choose low-noise machinery or equipment, or keep the machinery and equipment in a low-noise state as far as possible. For example, motors or pumps using low-noise products can reduce noise by 10-20dB or more. Two half load motors are much lower than one with the same power. In addition, the device method for improving the poor sound source also greatly reduces the noise. For example, install the machine equipment on a suitable vibration damping machine base and tighten the bolts that may be loose to prevent potential vibration, or fix the vibration sound on the rigid wall and carry out regular maintenance. And maintenance. However, in most cases, it may be difficult to implement sound source management due to many factors, such as high costs, the inability of the machine to stop and space constraints.

When the sound barrier is close to the noise source, the side of the sound barrier facing the sound source is subject to sound absorption treatment to reduce the reflected sound of the sound barrier and help reduce the noise. The sound absorption frequency characteristics of the sound absorption material shall be consistent with the frequency characteristics of the sound source. The low-frequency noise source shall enhance the low-frequency noise source, and the high-frequency noise source shall enhance the sound absorption of the high-frequency noise source. Before sound absorption treatment, the noise spectrum shall be measured first, and sound absorption materials shall be selected according to the spectrum. If the frequency characteristic of sound absorption is exactly opposite to that of noise, it will be futile.