At 10:02 AM 4/24/2008, you wrote: >In message <[EMAIL PROTECTED]>, "David C. >Partridge" writes: > >>From the paper: > >>From the paper: > > > >"... can be understood by comparison with the optical concept of "total > >internal reflection," or by the acoustic "whispering gallery"phenomenon > >experienced in large circular halls." > > > >The classic whispering gallery is in St. Paul's Cathedral, London. If you > >stand near the wall on one side, you can hear someone standing in a similar > >location on the other side even when they talk very quietly - hence the term > >whispering gallery. > > >It was my impression that the resonators which operatte in WG mode >uses the _other_ pecularity about whispering galleries, an effect >very few people even know about, reasons which will be obvious in >a moment: > >Empty the entire gallery of as much absorbant material as possible, >including people and their clothes.
Fascinating stuff.. See also a paper by Georg Essl in Acuostics Research Letters Online [DOI:10.1121/1.1929347] "Whispering" waves and Bate's ridges in numerical experiments He refers to some papers by Rayleigh (hey, how often do you get to cite Rayleigh in a paper?) _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
