Archives of Acoustics, 27, 4, pp. , 2002

Propagation of the main signal in a dispersive Lorentz medium

A. Ciarkowski
Institute of Fundamental Technological Research, Polish Academy of Sciences

Evolution of the main signal in a Lorentz dispersive medium
is considered. The signal propagating in the medium is excited by a
sine-modulated pulse signal, with its envelope described by a hyperbolic tangent
function. Both uniform and non-uniform asymptotic representations for the signal
are found. It is shown how the uniform representation reduces to the non-uniform
one. The results obtained are illustrated with a numerical example.
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