The cheapest, densest product generally available
is 5/8" fire rated sheetrock. If you have room
use a couple of layers. Air gaps are helpful but
you start wasting space real fast.
Labyrinth type air passages for ventilation work
well with little or no absorbative material. The
more 90 degree bends the better, soundwise.
Unfortunately, with a labyrinth you will probably
have to use some sort of forced air for cooling.
It may not take much more than a couple of muffin
fans.
bye
Kelley Mascher (206) 528-2713
Children's Hospital & Med. Center mascher@u.washington.edu
Audiology Research Seattle, Washington USA
On Wed, 17 Mar 1999, Tony Clark wrote:
> Date: Wed, 17 Mar 1999 09:54:06 -0600
> From: Tony Clark <lotus.tony@airmail.net>
> To: Shop-Talk <shop-talk@autox.team.net>
> Subject: Compressor sound
>
>
>
> -----Original Message-----
> From: Ken Landaiche
>
> >Well, I am really trying to eliminate the noise from the compressor without
> >building a room outside of the garage. So I'm open to suggestions. Those
> who
> >do build an outside closet must provide some ventilation. Are there any
> >guidelines for that? Can the ventilation in an in-garage closet be sound
> >baffled in some way. What do you shop-talkers think?
>
> On the dampening of sound, I once asked my friend in the field of audilogy
> about materials to use for such purposes . . . He corrected my ideas which
> were somewhat confused with heat insulation and reminded me that it's
> density that dampens sound . . lead sheet is good! I'm interested in
> something dense, fireproof and cheap . . .Maybe some of this "cement board"
> that's used to back plaster and tile would be good.
>
> Tony
> (Asphalted felt is fantastic but burns like crazy)
>
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