What does a highway noise barrier mainly rely on to absorb sound?

　　The key challenges of the noise barrier in the transportation system can be divided into highway noise barriers, urban expressway noise barriers, bridge composite noise barriers, metal aluminum plate noise barriers. A fast noise barrier is a noise barrier whose main function is to be used in the construction of roads between the noise source of highway transportation and nature reserves. Because the noise generated by highway transportation companies in China has added inconvenience and harm to our lives and work, setting up road insulation screens is the main way to control noise.

　　The expressway noise barrier is easy to assemble, and the highway noise barrier is easy to assemble. The control panel is inserted into the h-column in sequence. This panel is embedded and seamlessly spliced. The appearance is beautiful and generous, the surface is diverse, the shape is flexible, and it corresponds to the surrounding environment. It is durable, unique, and has weathering corrosion, surface processing, and processing capabilities. Easy to clean; each control module should be disassembled and replaced separately, and daily maintenance and replacement is relatively simple.

　　The upper end of the flat-arm composite noise barrier uses a perforated metal sound-absorbing plate, and the top is a micro-arc, which helps to improve the noise reduction range and improve the noise reduction effect. The bottom uses a transparent noise barrier. The sailor's visual effect is good, and the scenery along the way can also be seen. The integrated design of the noise barrier is smooth and beautiful.

　　What does a highway noise barrier mainly rely on to absorb sound?

　　1. Fiberglass cotton

　　Ultra-fine glass wool is a heat-insulating material that emerged in the 1980s. Sound insulation boards are mainly used for highways, elevated roads, and other noise sources for sound insulation and noise reduction. It refers to a wall structure set up on the side of railways and roads to reduce the impact of driving noise on surrounding residents. Fast noise barriers are mainly used for roads, highways, elevated roads, and other noise sources for sound insulation and noise reduction. It can be divided into pure sound insulation scattering noise barriers and composite noise barriers that combine sound absorption and sound insulation. The latter is more effective sound insulation. The railway noise barrier inserts a device between the sound source and the receiver, so that the ultrasonic wave propagation has a significant additional loss, thus weakening the noise pollution in a certain area where the receiver is located. This device is called a noise barrier. This is a member of the fiberglass family. It uses A centrifugal suction and blowing technology to melt fiberglass, spray thermosetting resin to make it a smooth material, and then heat it to solidify.

　　2. Aluminum fiber

　　Aluminum fiber sound-absorbing board is made by cold rolling two layers of aluminum mesh sandwiched between aluminum fiber felt and aluminum foil. It has good sound absorption, high compressive strength, light weight, convenient transportation, and good aging resistance.

　　3. Composite material

　　Composite materials are made of pure aluminum or aluminum alloy profiles with additives and foaming technology, and have the characteristics of metal and foaming.

　　Composite panels have very good sound absorption characteristics, the average sound absorption coefficient should not exceed 0.64, the noise reduction coefficient nr75, and are very good for low-frequency environmental noise characteristics, better than other types of sound-absorbing materials. The surface of the composite material can clean itself after rain without affecting the sound characteristics.

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