CAJ | 학술논문

以往关于雷声的研究都限于观测点雷声频域范围的探讨,由于噪音和衰减因素的影响,观测点的雷声频谱有很大失真.针对在兰州地区观测的一次雷暴过程中的雷声信号,利用数字信号处理技术,由观测点处的雷声音频信号得到频率谱,并对雷声频谱进行噪音分析;然后结合声音在大气中传播的衰减理论,分析了不同大气环境对声吸收的影响,并推算出了声源附近的雷声频率谱.
이왕관우뢰성적연구도한우관측점뢰성빈역범위적탐토,유우조음화쇠감인소적영향,관측점적뢰성빈보유흔대실진.침대재란주지구관측적일차뇌폭과정중적뢰성신호,이용수자신호처리기술,유관측점처적뢰성음빈신호득도빈솔보,병대뢰성빈보진행조음분석;연후결합성음재대기중전파적쇠감이론,분석료불동대기배경대성흡수적영향,병추산출료성원부근적뢰성빈솔보.
@@@@There are a few references on thunder at present, moreover they are all about thunder frequency spectrum at observation location. However, thunder frequency spectrum in observation location is a distorted signal because of noises and sound attenuation effects. In this paper, thunder signal from lightning discharge channels is obtained in Lanzhou of China. By using digital filter and Fourier transform, thunder frequency spectrum at the observation location is gained. Then, thunder frequency spectrum near lightning discharge channel is computed with the theory of sound propagation effects.