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Acoustics

To: brass-band@xxxxxxxxxxxxxxxxxx
Subject: Acoustics
From: <Robert_C_Knight@xxxxxxxxxx> id xma012610; Thu, 2 Oct 97 10:38:51 -0400 id AA03948; Thu, 2 Oct 1997 10:38:50 -0400
Date: Thu, 2 Oct 1997 15:40:26 +0100
Priority: low
Reply-to: brass-band@xxxxxxxxxxxxxxxxxx

To:       brass-band@xxxxxxxxxxxxxxxxxx@inet
cc:
From:     Robert C Knight @ SB_PHARM_RD
Date:     02-Oct-97 03:40:26 PM
Subject:  Acoustics
Categories:

A couple of years ago we built a rehearsal hall, and over the following
years added heating and carpets that we couldn't afford in the first
instance. The result is warm and dry - for many years before we rehearsed
in a wooden hut - but we didn't get the acoustics right. No-one in the band
is expert in this field, so we are looking for anyone who may be able to
give us some advice: perhaps someone out there has solved a similar
problem.
The rehearsal room itself is quite small (about 6 metres by 7) with a
pitched roof around 4m high in the middle and 2.5 at the walls. The walls
are standard blocks finished with plaster. And the problem: it's too loud!
We know that most of the problem is at medium to high frequencies, because
we started with loads of old carpets (say 2cm thick) on the concrete floor,
and when we replaced them with thinner carpet tiles it got much worse. A
couple of cm of carpet isn't likely to have much effect at low frequencies,
I think. And heavy curtains on one wall have helped a lot.
Any suggestions would be appreciated.

Bob Knight
Secretary, Blewbury & District Brass Band
Blewbury, South Oxfordshire, UK

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