一种重构辐射噪声调制谱的方法

A method of reconstructing radiated noise modulation spectrum

在进行辐射噪声信号的仿真研究中，希望利用经滤波、特征提取等处理所得到的反映目标特性的线谱、连续谱、调制谱来重构辐射噪声，以便于研究辐射噪声在声场中的传播特性．本文提出了利用迭代算法估算调制深度谱的算法，给出了时域辐射噪声的重构模型，以实测数据的调制谱为出发点，来重构其时域信号，并对重构前后的调制谱进行了误差分析，取得了较好的效果。

In the simulation research of radiated noise, to study the propagation proper-ties of radiated noise in a sound field, the radiated noise is reconstructed with line spectra, continuous spectra and modulated spectra. In this paper, a algorithm to calculate the modulated depth spectra with iterative is proposed and a radiated noise reconstructing model presented, good simulation result compare with the real measurement data is ob-tained.