🚀 go-pugleaf

The size and shape depend on what you want to achieve with them.

A shell needs to be large compared to the wavelength of the sound, to
reflect a significant amount of the energy.

So you can use different sized shells to improve the audibility of high
and/or medium and/or low notes, in any chosen part of the auditorium.

We recently rebuilt an ancient Wurlitzer pipe organ in the basement of
Clydebank Town Hall, near Glasgow, Scotland. We used curved hardboard panels
to reflect the sound up and "back" into the auditorium. Size and shape are
quite critical. (It might actually be easier to do it with electronic sound
reinforcement but that would not have been in keeping with the spirit of the
restoration.

However, we DID resort to interfacing the console to the chamber with
computers, instead of a few thousand long narrow lead pipes.

Compromise, compromise.....;~]




Amy Seng wrote in message <36AE621D.DA458696@optonline.net>...
>Hi, I was wondering if anyone knew anything about these shells.  I'm not
>really sure what they're called, but they're usually used when
>converting an auditorium into a concert hall.  They are placed behind
>the orchestra and basically look like an added wall of panels with an
>angled upper section.

[Moderator's note: Quoted text deleted. -TB]