摘要
运用声功率测量、表面声强测量和频谱测量等方法,分析认为风扇噪声、电机噪声和燃烧噪声是加热器的主要噪声源,由此产生的噪声经方箱、回风口等向外辐射,提出了采取回风消声器消声与整机隔声罩隔声等降噪措施。试验结果表明,加热器各频带的声压级都有了一定程度的降低,特别是人耳最为敏感的1kHz处的噪声降低了4 1dB。
With sound power, distribution of sound intensity and frequency spectrum, the noise property of vehicle fuel-fired air heater was analyzed. It is pointed out that fan noise, electromagnetic noise and burning noise are the main noise sources, which spread out through the air-inlet and iron box. As a settlement, the measurements silencer and rectangular enclosure are adopted. Application results show that the noise level decreases 4.1 dB in 1 kHz band.
出处
《交通运输工程学报》
EI
CSCD
2004年第1期54-57,共4页
Journal of Traffic and Transportation Engineering
关键词
汽车工程
燃油空气加热器
噪声控制
消声
隔声
Acoustic variables control
Electromagnetic waves
Fans
Hot air heating
Intake silencers
Sound insulation
