[LAD] Audio Levitation

[Charles Z Henry]

On Fri, Jan 3, 2014 at 4:03 PM, Charles Z Henry <czhenry at gmail.com> wrote:

>
> Why do we see this technique applied with high frequencies?  At the node
> locations, there is the highest peak spatial derivative of the pressure
> while at the same time, the volume velocity of air goes to 0.
>
> Vice-versa at the anti-nodes.
>

I got that wrong:
The peak pressure difference occurs where the volume velocity is zero.
The location of the peak spatial derivative of pressure coincides with the
location of peak volume velocity.
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