Pei Shan-bao, Liu Rong-zhong, Guo Rui. Analysis of characteristics of sequential underwater explosion sound signal based on wavelet transform[J]. Explosion And Shock Waves, 2015, 35(4): 520-526. doi: 10.11883/1001-1455(2015)04-0520-07
Citation:
Pei Shan-bao, Liu Rong-zhong, Guo Rui. Analysis of characteristics of sequential underwater explosion sound signal based on wavelet transform[J]. Explosion And Shock Waves, 2015, 35(4): 520-526. doi: 10.11883/1001-1455(2015)04-0520-07
Pei Shan-bao, Liu Rong-zhong, Guo Rui. Analysis of characteristics of sequential underwater explosion sound signal based on wavelet transform[J]. Explosion And Shock Waves, 2015, 35(4): 520-526. doi: 10.11883/1001-1455(2015)04-0520-07
Citation:
Pei Shan-bao, Liu Rong-zhong, Guo Rui. Analysis of characteristics of sequential underwater explosion sound signal based on wavelet transform[J]. Explosion And Shock Waves, 2015, 35(4): 520-526. doi: 10.11883/1001-1455(2015)04-0520-07
To obtain the characteristics of sequential underwater explosion sound signals effectively, the sequential underwater explosion sound signals have been gradually extracted by the Mallat algorithm of wavelet transform. The energy distribution of the sequential underwater explosion sound signal at different frequency ranges was discussed by adopting the discrete wavelet transform. The Welch spectrum method had been used to extract the power spectrum characteristics of sequential underwater explosion sound signals. The time-frequency characteristic was analyzed by using the discrete wavelet transform. The results show that the sequential underwater explosion has characteristics of strong sound power, longer sound duration and wide frequency range, the sound pressure level can be more than 190 dB, the energy is mainly concentrated in area of 48 kHz, with the higher energy band in the low frequency band. These characteristics show that the sequential underwater explosion can be used as a source of sound interference. The results also show that wavelet transform can be used to study the characteristics of the sequential underwater explosion sound signals reasonably so as to analyze them accurately.
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