Alcofrolic, Mistella; Op Shop

Benjamin Barrett gogaku at IX.NETCOM.COM
Tue Dec 26 19:18:59 UTC 2000


I wonder if these aren't really parabolas. What looks to be a hemisphere
might actually be parabolic or have a parabola in the innermost section;
same with a cylindrical ceiling.

This is just a suggestion as I don't know anything about acoustics other
than this property of parabolas. I do remember from geometry, though, that
parabolas can take on deceiving shapes.

Benjamin Barrett
gogaku at ix.netcom.com

> -----Original Message-----
> From: American Dialect Society [mailto:ADS-L at LISTSERV.UGA.EDU]On
> Behalf Of Grant Barrett
>
> On mardi 26 d├ęcembre 2000 14:46, Ray Ott <Amcolph at AOL.COM> wrote:
> >A circular shape will also work, as in the whispering gallery in
> the dome of
> >St. Paul's
>
> And on certain platforms of the Paris metro, one can sit on a
> bench and hear
> startlingly clear conversation by people sitting on the bench on
> the other side of the
> platform, bounced off the near-half-cylinder ceiling.



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