 
Commercial and industrial soundproofing offers a unique set of
challenges. As a 
general rule the areas to be soundproofed are larger and
more open. For example, if you are soundproofing a metal crushing machine in a factory
setting, you need to deal with the high ceilings and open spaces. If you plan
to construct an enclosure around the machine, many times that enclosure will 
be free standing on at least 2 legs. Also you will want to
construct walls 
that are a minimum of 8' tall, the higher the walls of the
enclosure the 
better the soundproofing will be. The enclosure will need a
gateway or a door 
where workers will be able to work with the machine as well
as maintain it. 
 If the machine is in
a corner, that makes building the enclosure much easier 
because you would only need to construct 2 soundproof walls
for an enclosure.
 It is always best to
construct an enclosure much the same as building a room 
around the machine. In other words using metal studs and constructing  solid 
walls that will contain soundproofing agents such as
American mass loaded 
vinyl or the America Mat closed cell foam ma, maybe a
combination of both 
materials. 
 The mass loaded vinyl
(MLV for short would be screwed to the stud structure 
using self taping drywall screws with washers on them. It is
recommended that 
the MLV be installed horizontally across the studs and that
the seams be over 
lapped by at least 1 inch. You will need to caulk all of the
seams as well as 
the over lap and around the entire perimeter of the vinyl
membrane.
 Once the MLV is
installed and sealed with the caulk, you have the option of gluing a layer of
the 1/2" or the 1" closed cell foam mat directly to the 
back of the MLV membrane. 
 Now the America mat
will help, but is not essential to obtain good soundproofing from this system.
Once the MLV and the closed cell foam are installed onto the stud framework 
it is time to drywall both sides of the wall assembly. I
would recommend using 5/8" drywall on both sides of the wall to add
additional mass and 
therefore additional soundproofing to the enclosure.
Finally, when you install your door, you will want to
install a solid core door which will help to block the noise from escaping
through the door.
Well that's about it for soundproofing machinery in an
Industrial 
application. I will be writing more on other commercial
soundproofing 
projects in later articles. This is Dr. Bob...Adios!
 
 
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