Recital Hall Acoustics

[David Ilvedson]

Thanks for the correct terminology.  I don't know what the "Helmholz etc."
is.

David I.

----- Original Message -----
From: "Don" <pianotuna@accesscomm.ca>
To: "College and University Technicians" <caut@ptg.org>
Sent: Saturday, March 22, 2003 11:35 AM
Subject: Re: Recital Hall Acoustics


> Hi,
>
> I think you mean 200 hertz not megahertz....unless your audience consists
> of "my favorite martian". What about Helmholtz resonators? They are
> tuneable to specific frequences so could be used like a "notch" filter.
>
> At 09:09 AM 3/22/2003 -0800, you wrote:
> >I went online to check on bass traps for my local community concert
venue.
> >I have a problem with the 200 mhz range.  I'm wondering whether or not I
> >need to put these acoustic bass trap wedges in all four corners or just
> >behind the stage?  Looks like around $50 for a 4 foot piece....
> >
> >David I.
> >----- Original Message -----
> >From: "James Ellis" <claviers@onemain.com>
> >To: <caut@ptg.org>
> >Sent: Saturday, March 22, 2003 7:55 AM
> >Subject: Recital Hall Acoustics
> >
> >
> >> Wim Blees certainly got the most for the money if his $500 worth of
> >carpet,
> >> wooden strips, and screws solved the problem.  That's about what I
would
> >> expect an acoustical engineer to have charged for a one-time
evaluation.
> >> Charging $10,000 for an evaluation, in my opinion, is way out of line.
> >> After all, this is a recital hall, not the Cathedral of St. John the
> >Divine
> >> in New York City with its 200 x 600 ft. nave, and dome high enough to
> >> accommodate the Statue of Liberty.
> >>
> >> Carpet will work wonders for damping out the high frequencies, but it
will
> >> do little for the mid-range, and nothing for the low frequencies.  In
> >Wim's
> >> case, it seems that damping the high-end frequencies was sufficient to
> >> solve the problem.
> >>
> >> I mentioned the commercially available panels to inform those facing
> >> similar problems that all sorts of options are available to them.  For
> >> those who have had any experience in this area, common sense will tell
you
> >> what you need to do.  Hard, flat, parallel side-walls, and hard curved
> >rear
> >> walls that bring reflected sound to a focus up in the seating area are
> >> killers.  This is so obvious, and yet it happens all the time because
too
> >> many architects seem to know nothing about acoustics.
> >>
> >> Jim Ellis
> >>
> >>
> >> _______________________________________________
> >> caut list info: https://www.moypiano.com/resources/#archives
> >
> >_______________________________________________
> >caut list info: https://www.moypiano.com/resources/#archives
> >
> >
>
> Regards,
> Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T.
>
> mailto:pianotuna@accesscomm.ca
> http://us.geocities.com/drpt1948/
>
> 3004 Grant Rd.
> REGINA, SK
> S4S 5G7
> 306-352-3620 or 1-888-29t-uner
> _______________________________________________
> caut list info: https://www.moypiano.com/resources/#archives