Where was the Westervelt equation for nonlinear acoustics first publicised?

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Hauke Gravenkamp

Not sure, isn't it based on this formulation?

Westervelt, P. J. (1963). Parametric Acoustic Array. The Journal of the Acoustical Society of America, 35(4), 535–537.

Vikash Pandey

Hauke is correct. That particular work was presented at the ASA meeting in 1963. See Section 3 of the attached article. It also mentions some interesting facts about that event.

Leander Claes

Thanks a lot Hauke and Vikash. The papers title doesn't quite reflect the content, so I didn't look into it.

Thumbs up!