The Applied Research of Time-Frequency Analysis Method Employed in Seismic Signal Processing

Abstract:

In the traditional processing of seismic signal, the frequency domain analysis method is always available to research some features which always vary with frequency. However, the condition of parameters which vary with time going can’t be considered in this method. So all the information in time domain have been neglected. In this article, time-frequency analysis method called HHT(Hilbert-Huang transform) is applied to analyze the Qingping wave of Wenchuan earthquake meticulously, which is the most advantaged to dissect the change features of the seismic record at different scales. Then we can get the dual properties in time domain and the frequency domain, such as the IMF function of each modal and the instantaneous frequency. For reflecting the time-frequency characteristics exactly and clearly, the Hilbert spectrum has been used to show these messages in the time-frequency plane.

• Periodical: Advanced Materials Research (Volumes 955-959)
• Pages: 1809-1812
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.955-959.1809
• Online since: June 2014
• Authors: Zuo Ju Wu*, Zhi Jia Wang, Jun Wei Bi
• Keywords: Hilbert Transform, Huang Transform, Instantaneous Frequency, Seismic Oscillation Natural Attributes, Time-Frequency Characteristics

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