摘要
单个水滴冲击在水面上引发的噪声场是分析雨致噪声问题的基础。获取并分析单水滴与多水滴声信号特征,对水滴声信号进行了详细的统计分析,给出了初始冲击声与非初始冲击声的幅值分布、波形类型分布、各种波形的频谱特征以及非初始冲击声出现组数的比例。最后将统计结果应用于雨滴声信号的建模仿真,通过与实测多水滴声信号的波形和频谱对比,表明了仿真水滴声信号的可行性。
The noise field induced by a single water droplet impacted on the water surface is the basis for analyzing the rain-induced noise problem. This paper presents the characteristic analyses of the obtained single and multi-drop acoustic signals, as well as the simulation of the main characteristics of rain noise. The research made statistics and analysis in detail of the signals induced by water droplets, giving the amplitude distribution of the initial impact sound and the un-initial impact sound, the distribution of waveform type, the spectrum characteristics of various waveforms, and the proportion of groups of appeared un-initial impact sound. At last the acoustic signals of water droplets were simulated based on statistical data. The comparison with waveforms and spectrum of multiple droplets sound that have been tested actually indicates feasibility of the acoustic signal simulation.
作者
孟昭然
朱广平
MENG Zhaoran;ZHU Guangping(CSIC 760 Institute,Dalian 116103,China;College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,China)
出处
《应用科技》
CAS
2018年第4期104-108,115,共6页
Applied Science and Technology
关键词
雨噪声
雨滴声信号
信号仿真
频谱特征
波形分类
声信号测量
雨噪声模拟
波形研究
rain noise
rain drop acoustic signal
signal simulation
spectral characteristics
waveform classification
acoustic signal measurement
rain noise simulation
waveform research
