STC (sound transmission class) refers to the ability of a building
partition to absorb vibrations of various frequencies, thus reducing
audible sounds from the other side, according to wikipedia.
What I would like is to gather info on the properties of various
mixtures of papercrete relating to sound insulation. If you have any
info or suggestions, I would love to hear them.
Also, what sort of tests are you talking about? I would love to
conduct some tests which would provide usable data on some of the
properties of PC, but many of these seem to involve expensive
equipment and a degree of expertise to complete in any way that would
provide useful information to others. If you could help/ complete/
reference any such tests, I would really appreciate it.
Sound tests in particular seem like they would be difficult, since you
would have to isolate transmissions through the material/structure
involved from vibrations transmitted through the surrounding air and
materials. Any thoughts on this?
--- In papercreters@yahoogroups.com, sire@... wrote:
>
> You don't mention whether the floor was made from ferrocement, but
it would be the "paper" in "papercrete" that would provide some
sound-deadening qualities. Similarly lightweight aggregate with
insulation qualities such as perlite, vermiculite, pumice, etc., that
also would be helpful. There are tests that have been done on
drywall made for sound-deadening purposes, but I'm not sure how that
is different from standard drywall. A sound test would be easy to
construct, although I'm too lazy right now to look up what "STC" is an
abbreviation for.
>
> Neal
>
> -------------- Original message --------------
> From: Spaceman <Spaceman@...>
> Can't give you any numbers for STC of PC, but when I built a sensory
isolation chamber about 25 years ago from ferrocement I found that
while the chamber isolated me from any airborne vibrations it still
transmitted ground vibrations (like passing vehicles). You might
consider some sort of dampers isolating your chamber from anything
solid - mount it on a pile of marshmallows, so to speak.
>
> Spaceman
>
> chorizochub wrote:
> Hello, everyone- I am new to the group, and I am pretty excited to
> learn more about PC.
>
> The first project I am attempting is a sensory deprivation chamber to
> use for meditation... I am hoping to achieve a STC of 60, though
> thought the upper 40 range would be acceptable.
>
> Does anyone know anything specific about the soundproofing qualities
> of PC? I have found only vague references to its vibration-absorbing
> qualities in my research, and am having a hard time coming up with any
> exact info to work with.
>
> If not, it might be a good idea for a few of us to collaborate in some
> experimentation, to see what we can find out about it. I am assuming
> that someone, somewhere has/ is finding out, but I cannot find it, so
> it would be nice to figure it out so we can share it with others.
>
------------------------------------
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