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Sound barriers are primarily used for noise reduction and sound insulation on highways, expressways, elevated composite roads, and other noise sources. They are categorized into purely sound-insulating reflective sound barriers and composite sound barriers that combine sound absorption and sound insulation; the latter is a more effective method of sound insulation.
Sound barriers (noise barriers) are primarily used for noise reduction and sound insulation on highways, expressways, elevated composite roads, and other noise sources. They are divided into reflective sound barriers for pure sound insulation, and composite sound barriers that combine sound absorption and sound insulation, with the latter being a more effective sound insulation method. They refer to wall-like structures erected alongside railways and roads to mitigate the impact of traffic noise on nearby residents.
Approximately 17% of cities experience moderate pollution and 49% experience light pollution from road traffic noise. Erecting sound barriers to mitigate traffic noise pollution has become the primary method for urban road noise control. Sound barriers have rapidly developed due to their unique advantages and are widely applied in cities such as Beijing, Zhengzhou, Guangzhou, and Chongqing.