Noise barrier (also known as Noise Fence, Acoustic Barrier, Noise Wall or Sound Barrier Wall) have been made of a number of different materials over the years. Noise barriers are solid obstructions built between noise sources, be it highway noise or air conditioning equipment,that are designed to be “line of sight” interruptions between the noise source and the receiver.
The construction principle of the highway noise barrier is that the opening surface (panel) of the metal sound absorption plate is mainly used to introduce noise, and at the same time it has sufficient strength to deal with the impact of splashing small objects during the driving of road vehicles, and its effect on noise shielding is limited of. The main shielding function is the shielding plate (back plate) on the other side. The higher the shielding effect, the more obvious the reflection of the noise, which can form a strong sound absorb to absorb the noise multiple times. Therefore, it is unreasonable for the thickness of the front panel and the back panel of the previous product to be unequal thickness. The back panel is about 20% thicker than the panel, which can also reduce the occurrence of resonance.
The main structure of the noise reduction principle of the metal sound barrier is a “box” made of a metal plate, filled with sound absorbing material inside, and the side of the box is opened (with a certain opening ratio), which serves as an open surface for noise absorption. There is no hole on the other side, which is the reflection surface after the noise enters, which plays a role in shielding the noise, and the box should be completely closed around. The principle is that when the noise enters the box body space, the noise is continuously reflected in the box body and enters the sound absorbing body, continuously absorbed, and the noise energy is continuously converted and reduced.
Our Highway noise barrier roll forming machine is designed to produce the noise barrier panel, which is fully automatically controlled by PLC control system, has the advantage of high efficiency and save labor cost.
