【摘要】 针对采集的风力发电机组噪声信号,对其进行时域和频域分析,以图形直观展示声压信号的波动情况,得出风力发电机组噪声信号各频率成分及频率分布情况。探讨了一种频域A计权、计算瞬时A声级、求解风力发电机组噪声信号连续等效A计权声压级的算法,并基于MATLAB软件平台对噪声信号进行时域分析、频谱分析、等效连续A计权声压级分析的仿真实现。更多还原

【Abstract】 According to the collected wind turbine noise signal, the time domain and frequency domain analysis were carried out. The fluctuation of sound pressure signal was visually displayed by graphics, and the frequency components and frequency distribution of wind turbine noise signal were obtained. An algorithm for A-weighting in frequency domain, calculating instantaneous A-weighted sound level, and solving continuous equivalent A-weighted sound pressure level of wind turbine noise signal was discussed. Based on MATLAB software platform, the simulation of time-domain analysis, frequency spectrum analysis and equivalent continuous A-weighted sound pressure level analysis of noise signal was carried out.更多还原