3rd French conference on acoustics
J. Phys. IV France 04 (1994) C5-733-C5-736
Waveform transition in the transient focusing fieldT. OTANI and H. TOMINAGA
Department of Electrical Engineering, Faculty of Engineering, Doshisha University, Kamigyo-ku, 602 Kyoto, Japan
In classical optics and acoustics, the focusing field for harmonic or monochromatic waves is characterized by a phenomenon of wave concentration and phase anomaly. For the transient focusing field, significant waveform deformation or waveform transition takes place in the vicinity of the focus. It is shown here theoretically and experimentally that the focusing of the transient wave is characterized by time reversal and polarity inversion effects.
© EDP Sciences 1994