摘要
本文研究运用组合传感器和声压、振速联合信号处理技术进行低噪声通过特性的测量。通过特性的背景噪声由非相干的各向同性白噪声和相干的交通干扰组成，交通干扰又分为平稳与非平稳两种。用平均声强器来抗非相干干扰；用交通干扰能量流中心方位抑制技术来抗平稳的相干干扰；对于非平稳的相干干扰则需用自适应的交通干扰能量流中心方位抑制技术。仿真试验表明效果良好。
A new method of low intensity radiated noise measurement is shown using acoustic combined sensor and combined signal processing with pressure and particle velocity. The noise background consists of both incoherent isotropic white noise and coherent traffic noise. The stationary and non- stationary traffic noises are considered.Acoustic intensity averager has signal-noise ratio gain in the isotropic background, and the coherent interference is cancelled by the technology called ' Thaffic Noise Energy Flow Center Azimuth Restraint', (EFCAR). For non-stationary background the adaptive signal processing must be used. The computer simulation shown that the effects of this implement are good enough.
出处
《应用声学》
CSCD
北大核心
2000年第5期29-34,共6页
Journal of Applied Acoustics
基金
高等学校全国优秀博士学位论文作者专项资金!199939
关键词
低噪声
通过特性
测量
仿真
声压
振速
Incoherent isotropic white noise, Coherent traffic noise
