Acoustic Signals Analysis Based on Empirical Mode Decomposition and Spectrum Analysis Technique
A method to analyze the acoustic signals collected in fully-mechanized caving face is presented in this paper. Through analyzing the marginal spectrum and frequency spectrum of intrinsic mode functions obtained by empirical mode decomposition, acoustic signals’ frequency and amplitude characteristics are gotten, that is, high frequency signals about 1000Hz ~2800Hz are produced when the top coal is combined with gangue. Furthermore, the acoustic signals’ instantaneous energy spectrums in the frequency range of 1000Hz ~2800Hz can be used to identify the coal-rock interface.
Zhu Zhilin & Patrick Wang
Y. L. Zhang "Acoustic Signals Analysis Based on Empirical Mode Decomposition and Spectrum Analysis Technique", Applied Mechanics and Materials, Vols. 40-41, pp. 91-95, 2011