Title :
Propagation of classical waves in one-dimensional disordered media: Characterization by a time-frequency method
Author :
Richoux, O. ; Depollier, C. ; Hardy, J.
Author_Institution :
Lab. d´´Acoust., Maine Univ., Le Mans, France
Abstract :
This paper presents an application of the time-frequency methods to characterize the dispersive mechanical waves traveling in a one-dimensional periodic or disordered medium. The dispersion characteristic is a relation between the wave number k and the frequency w: w=w(k) and is another way to express the theory of wave motion without partial differential equation. So, in order to investigate the propagation in complicated waveguides, time-frequency methods may be efficient tools
Keywords :
dispersive media; elastic waves; nonlinear systems; time-frequency analysis; wave propagation; waveguide theory; 1D periodic medium; classical waves; disordered medium; dispersion characteristic; dispersive mechanical waves; harmonic pressure; one-dimensional disordered media; rectangular waveguide; time-frequency method; wave motion; Acoustic waveguides; Acoustic waves; Dispersion; Frequency measurement; Impedance; Lattices; Neck; Partial differential equations; Time frequency analysis; Time measurement;
Conference_Titel :
Electronics, Circuits and Systems, 1999. Proceedings of ICECS '99. The 6th IEEE International Conference on
Conference_Location :
Pafos
Print_ISBN :
0-7803-5682-9
DOI :
10.1109/ICECS.1999.814440
