Re: Possible acoustic phenomenon, very bizarre

[Joseph Bellina <jbellina@SAINTMARYS.EDU>]

Sounds like a drum to me.

cheers

On Sun, 19 Sep 1999, Leigh Palmer wrote:

> > 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