摘要
包络提取是声场层析成像的关键,考虑到希尔伯特变换法在提取声包络信号中毛刺多等缺点,提出了一种小波变换法来提高包络提取的精度.计算机仿真结果表明,用该方法提取包络的效果比希尔伯特变换方法效果好.
The key of acoustic tomography technology is envelop extraction. The method of Hilbert has disadvange such as burr. Wavelet is put forword to improve the pricsion of envelop extraction. Computer′s simulation shows that this method is better than Hilbert transform method.
出处
《华北工学院学报》
2004年第4期300-302,共3页
Journal of North China Institute of Technology
