【摘要】 针对城市客车发动机噪声较大的问题,分析了发动机噪声的构成及其频率范围,在阐述城市客车发动机隔声罩降噪原理的基础上,对其隔声罩降噪技术进行研究。提出以玻璃钢为外壳,内衬薄钢板,并贴阻尼材料和吸声材料的客车隔声罩。经检验,可有效降低车内噪声。更多还原

【Abstract】 In view of the city bus engine noise is large,we analyzed the composition of engine noise and frequency range,elaborated the principle of reducing city bus engine noise. Based on this,offered to fiberglass for the shell,lined with steel sheet and paste damping materials and sound-absorbing material as acoustical enclosure in city bus. Upon examination,this method can effectively reduce interior noise.更多还原