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RE: Acoustic problem.

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FWIW, I once visited a printing facility that had a lot of noisy equipment.
The building was a tilt up with open roof framing and bat insulation. What I
noted hanging from the ceiling was rough surfaced panels in about a 4' to 6'
grid. Each was about 2' wide and about 3' or 4' long. The walls had standoff
rough panels attached. The panels looked like about 4'x8' in a grid. I was
impressed with the way the noise levels were controlled. I do not know what
they were made of or how much weight they added.
Bob Hanson, S.E.

> -----Original Message-----
> From:	Rodrigo Lema [SMTP:rlema7(--nospam--at)]
> Sent:	Tuesday, February 15, 2000 2:44 AM
> To:	seaint(--nospam--at)
> Subject:	Acoustic problem.
> I've come up with a problem not strictly related to structural
> engineering. However, I was expecting you could help (also) in this one.
> It's about an industrial building (steel-framed) full of noisy machines.
> Problems: 1) Isolation of the building (complaining neighbours) 2)
> Reduction of the inside noise: there are at least 15 different machines,
> each with a particular type of noise (and frequency) and the idea is to
> obtain more favorable conditions for the workers. For the first one I was
> thinking of some sort of a screen (outdoors), because they usually work
> with the doors wide open and it would be of no use to totally isolate the
> walls. And for the second one, I thought of acoustic baffles situated
> under the ceiling to try to correct the reverberation. I'll be expecting
> your input in this one. Everything is important: links, books,
> suggestions... I'm totally out of my usual limits this time, but I said to
> me, what the heck, let's give it a try! Thanks in advance, Rodrigo Lema. 
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