PROPAGATION OF PULSE SIGNALS IN A DOUBLE-NEGATIVE ACOUSTIC MEDIUM |
| 3 | |
| 2013 |
| scientific article | 534.2 | ||
| 66-70 | left-handed media, metamaterials, double-negative media. |
| The propagation of acoustic pulses through a double-negative medium is studied. The causality principle is violated for a non-dispersive medium. However, in the medium with resonant density and compressibility response functions where the envelope of the excitation area moves with a finite group velocity, the causality principle is observed. The steady-state regime is similar to the case of monochromatic signal propagation in the medium without dispersion. |
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