Cavitation noise of bubble collapse is analyzed by wavelet transform in the paper.Compared with the traditional Fourier transform,the wavelet coeffcient image,which reflects the transient specialty of cavitation noise,is more suitable for analyzing transient noise.%本文采用小波变换对于空泡溃灭过程中辐射的瞬态噪声进行了分析,得到对应的小波系数随时间和频率的变化图象。与传统的Fourier谱相比,小波系数图象能描述出噪声谱中各种频率成分随时间的变化,更准确地反映出瞬态空化噪声的时域特征。
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