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The role of high-speed sound barriers in traffic noise control
On highways, speeding vehicles generate noise that significantly impacts the living environment of nearby residents. To mitigate this issue, highway noise barriers have emerged as an indispensable part of modern transportation infrastructure. Section 1: Structure and Function of Highway Noise Barriers Highway noise barriers primarily consist of three components: barrier body, support structure, and sound-absorbing and insulating materials. Barrier bodies are typically made of metal, concrete, or composite materials, exhibiting excellent durability and wind resistance. The support structure secures the barrier body to the ground, ensuring stability. Sound-absorbing and insulating materials are the core of the noise barrier, effectively absorbing and reflecting noise to reduce its transmission. When sound waves encounter the noise barrier, reflection, diffraction, and transmission are suppressed. Through its unique shape design and material selection, the noise barrier allows sound waves to continuously attenuate during propagation, achieving noise reduction. Section 2: Classification of Highway Noise Barriers Highway noise barriers are categorized into various types based on different criteria. By application location, they can be classified into highway noise barriers, bridge noise barriers, expressway noise barriers, etc. By application, they can be divided into sound-absorbing barriers, sound-insulating barriers, landscape noise barriers, and mobile noise barriers, etc. In addition, they can also be classified according to support structures
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