摘要
采用穿孔板制作局部隔声罩,用于降低某6缸柴油机油底壳的噪声辐射。通过对该柴油机油底壳的辐射噪声进行频谱分析,针对其噪声特点,设计了用于油底壳的局部隔声罩。试验结果表明,实测平均声压级降低了1.0 dB,吸声降噪效果明显。
The perforation plate was made into local sound insulation enclosure, to reduce the oil sump noise of some 6-cylinder engine. By the frequency spectrum analysis of radiated noise, the partial acoustic enclosure of oil sump was designed in accordance with the noise features. The results show that the average sound pressure level decreases by 1.0 dB（A）, which testifies the good absorption effect.
出处
《车用发动机》
北大核心
2009年第6期70-72,共3页
Vehicle Engine
关键词
柴油机
噪声控制
噪声测量
穿孔板
声压
diesel engine
noise control
noise measurement
perforation plate
sound pressure
