摘要
利用声级计和高速数据采集系统,测量了发射过程中户外和室内的噪声,对测得的信号进行了幅值谱和1/3倍频程分析。结果表明,发射过程的噪声频率分布在一个较窄的频带内,户外和室内噪声的能量分布有所不同,户外中心频率为160Hz和400Hz噪声的声压级最大,室内中心频率为50Hz和150Hz噪声的声压级最大。
Outdoor and indoor noise has been measured during the process of launching, using sound level meter and high-speed data acquisition system. The measured signals have been analyzed in terms of amplitude spectrum and onethird octave bands spectrum. Result shows that noise frequency in the process of launching distributes in a narrow frequency band, and the energy distribution of outdoor and indoor noise has different characteristics. Sound pressure level of 160Hz and 400Hz center frequency outdoor noise is the biggest, while to the indoor noise, the sound pressure level from 50Hz and 150Hz center frequency reaches the biggest.
出处
《弹箭与制导学报》
CSCD
北大核心
2006年第4期207-209,共3页
Journal of Projectiles,Rockets,Missiles and Guidance
关键词
发射过程
噪声测量
频谱分析
process of launching
noise measure
spectrum analysis
