Re: Possible acoustic phenomenon, very bizarre

[Leigh Palmer <palmer@SFU.CA>]

> Think about this: what happens when there is a standing wave in a pipe
> with sealed ends?   The pressure oscillation is maximum at the ends,
> right?  This is true regardless of which overtone is excited in the pipe?

Yes. Pressure antinodes are coincident with velocity nodes. If the
pipe is excited with any periodic signals, resonant or otherwise,
this will be true of all components of the series which comprise
them. This picture is correct only in the limit of small amplitudes,
however. It applies only to linear acoustics. You need not construct
elaborate examples like what follows to recognize this. Just think
about a periodic acoustic wave in air with an amplitude of two
atmospheres.

Leigh