Nonlinear distortion of short pulses radiated by plane and focused circular pistons.

@article{Averkiou1997NonlinearDO,
  title={Nonlinear distortion of short pulses radiated by plane and focused circular pistons.},
  author={Michalakis A. Averkiou and Mark F. Hamilton},
  journal={The Journal of the Acoustical Society of America},
  year={1997},
  volume={102 5 Pt 1},
  pages={2539-48}
}
Detailed measurements of finite-amplitude pulses radiated by plane and focused circular pistons in water are presented. Comparisons of time waveforms and frequency spectra, both on and off axis, are made with numerical calculations based on the nonlinear parabolic wave equation. Emphasis is on nonlinear distortion of amplitude- and frequency-modulated tone bursts. Use of short pulses enabled resolution of the direct and diffracted waves prior to their coalescence and subsequent shock formation… CONTINUE READING

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