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随现代交通运输事业的迅猛发展,机动车辆日益增多。来源于机动车的噪音越来越强烈,对人类生活的干扰与健康的威胁日益严重,整治与对付机动车源性噪音的研究已列入议事日程。 机动车包括各种客货汽油车、柴油车、大小各型拖拉机、各类摩托车及轧道车、叉车等。机动车源性噪音大致来源于10处:①发动机的轰鸣;②喇叭声;③排烟管有节奏的排烟声;④车体颠簸声;⑤车轮轧路声;⑥车厢内货物震动或装拆时的撞击声;⑦紧急刹车时的车轴摩擦声或无油行驶时的轴承摩擦声;⑧偶然的轮胎爆裂声或车祸时车体破坏声;⑨修理车辆时的敲击声或试发动发动机的声音;⑩车辆内音响的声音。其中,经常破坏人们正常生活环境的要数前三四种。虽不
With the rapid development of modern transportation, motor vehicles are increasing day by day. The noise from motor vehicles is getting more and more intense, and the threat to human life and health is worsening. Research on remediation and dealing with motor vehicle noise has been put on the agenda. Motor vehicles include all kinds of passenger and cargo gasoline vehicles, diesel vehicles, the size of various types of tractors, all types of motorcycles and rolling road cars, forklifts and so on. Motor vehicle noise comes from roughly 10: ① roar of the engine; ② horn; ③ rhythm smoke exhaust pipe; ④ bump sound body; ⑤ wheel rolling sound; ⑥ car shock or cargo loading ⑦ impact sound when demolished; ⑦ brake sound when the axle brakes or oil-free bearing friction sound; ⑧ accidental tire crash or car crash body sound; ⑨ repair the vehicle when the percussion sound or try to start the engine Sound; ⑩ vehicle audio sound. Among them, the number of the first three or four that often ruin people’s normal living environment. Though not