Scintillation index of high frequency acoustic signals forward scattered by the ocean surface

2007 ◽  
Vol 121 (1) ◽  
pp. 120-131 ◽  
Author(s):  
Benjamin Cotté ◽  
R. Lee Culver ◽  
David L. Bradley
Keyword(s):  
High Frequency ◽  
Ocean Surface ◽  
Acoustic Signals ◽  
Scintillation Index

Temporal coherence and time spread of ocean surface scattered high‐frequency acoustic signals

2001 ◽  
Vol 110 (5) ◽  
pp. 2635-2635
Author(s):  
Steven Lutz ◽  
David Bradley ◽  
R. L. Culver ◽  
Joe Keranen ◽  
Jon Reeves
Keyword(s):  
High Frequency ◽  
Ocean Surface ◽  
Acoustic Signals ◽  
Temporal Coherence ◽  
Time Spread

Scintillation index of ocean surface forward scattered HF acoustic signals

2004 ◽  
Vol 116 (4) ◽  
pp. 2576-2576
Author(s):  
Benjamin Cotté ◽  
David Bradley ◽  
R. Lee Culver
Keyword(s):  
Ocean Surface ◽  
Acoustic Signals ◽  
Scintillation Index

scholarly journals High‐frequency bistatic ocean surface scattering

1993 ◽  
Vol 94 (3) ◽  
pp. 1890-1890
Author(s):  
Richard Lee Culver ◽  
Peter Neuman
Keyword(s):  
High Frequency ◽  
Ocean Surface ◽  
Surface Scattering

Acoustic Signals Analysis Based on Empirical Mode Decomposition and Spectrum Analysis Technique

2010 ◽  
Vol 40-41 ◽  
pp. 91-95 ◽  
Author(s):  
Yan Li Zhang
Keyword(s):  
Empirical Mode Decomposition ◽  
High Frequency ◽  
Acoustic Signals ◽  
Intrinsic Mode Functions ◽  
Mode Decomposition ◽  
Analysis Technique ◽  
Marginal Spectrum ◽  
Rock Interface ◽  
Coal Rock ◽  
Instantaneous Energy

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.

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