Time–frequency analysis of transient dispersive waves: A comparative study

2007 ◽  
Vol 68 (3) ◽  
pp. 296-309 ◽  
Author(s):  
A. Apostoloudia ◽  
E. Douka ◽  
L.J. Hadjileontiadis ◽  
I.T. Rekanos ◽  
A. Trochidis
Keyword(s):  
Comparative Study ◽  
Frequency Analysis ◽  
Dispersive Waves ◽  
Time Frequency Analysis ◽  
Time Frequency

Time-frequency analysis of venous stenosis: a comparative study

2011 ◽  
Vol 44 (2) ◽  
pp. e61-e62
Author(s):  
Pablo Vasquez ◽  
Marco Munguia ◽  
Elisabeth Mattsson ◽  
Bengt Mandersson
Keyword(s):  
Comparative Study ◽  
Frequency Analysis ◽  
Time Frequency Analysis ◽  
Time Frequency ◽  
Venous Stenosis

Time Frequency Analysis of Dispersive Waves by Means of Wavelet Transform

1995 ◽  
Vol 62 (4) ◽  
pp. 841-846 ◽  
Author(s):  
Kikuo Kishimoto ◽  
Hirotsugu Inoue ◽  
Makoto Hamada ◽  
Toshikazu Shibuya
Keyword(s):  
Wavelet Transform ◽  
Frequency Analysis ◽  
Gabor Wavelet ◽  
Flexural Wave ◽  
Lateral Impact ◽  
Dispersive Waves ◽  
Time Frequency Analysis ◽  
Arrival Times ◽  
Time Frequency ◽  
Wide Range

A new approach is presented for investigating the dispersive character of structural waves. The wavelet transform is applied to the time-frequency analysis of dispersive waves. The flexural wave induced in a beam by lateral impact is considered. It is shown that the wavelet transform using the Gabor wavelet effectively decomposes the strain response into its time-frequency components. In addition, the peaks of the time-frequency distribution indicate the arrival times of waves. By utilizing this fact, the dispersion relation of the group velocity can be accurately identified for a wide range of frequencies.

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