Topband: Topband Digest, Vol 113, Issue 46

[Garry Shapiro]

It indeed is "whispering gallery mode", but I think you have mixed 
characters, times and places. I don't believe Franklin ever served in 
Congress--about the only thing he did /not/ do in his long and amazing 
life--and of course the modern Capitol was built long after he passed on 
in 1790. However, guided tours of the modern Capitol in DC often point 
out the whispering gallery spots under the main rotunda. And, as Rick 
points out, the phenomenon is quite general, and is responsible for the 
great acoustics of many of the ancient Greek amphitheaters.

Garry, NI6T

On 5/31/2012 4:59 PM, Rick Karlquist wrote:
> wa3mej at comcast.net wrote:
>> I think there is a more comon name for
>> this mode but cant remember what is is now.. and there have been several
> Whispering gallery mode.  The classic whispering gallery room is
> in the shape of an ellipse, where people at one focus can hear
> the people at the other focus, but it is on only 1 hop.
>
> Antipodal mode involves multiple hops.
>
> Rick N6RK
>
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