sound reduction

[John M. Formsma]

List,
 
I'm needing to further reduce the volume of a Yam G1 with a Disklavier. I've
installed a top foam pad and bottom acoustic foam baffles from Edwards
String Covers. The sound reduction has been quite noticeable, but is not
enough. The owners want to be able to have the piano play without drowning
out dinner conversation in an adjacent room. The piano is in a largish room
with hardwood floors throughout the house. The room is central to the house
and is open to the second floor. Not much for absorbing any sound in this
location, but that's what I'm working with.
 
What I'm considering doing is adding more acoustic foam to the bottom of the
piano as that seemed to be where most of the sound comes from, or at least
it's more noticeable by reflecting off the floor. There is room for another
4 inches of foam under the soundboard, and I suppose I could stuff it full
as necessary and cover it with a Dampp Chaser undercover if that would work.
???  The owners are not ready to put a rug under the piano, but might
consider that if nothing else will work. I saw something online
(International Piano Supply, I think) about neoprene caster cups. How much
would that help, if any?
 
I don't have any previous experience with acoustic foam and am learning as I
go. Anyone have experience with this kind of situation?  Any advice will be
appreciated.
 
Is there a better place to purchase the acoustic foam other than Edwards?
The pre-cut pieces are $110 wholesale, but it seems just as easy (and much
cheaper) to cut a piece that will fit into the various sections divided by
the beams. I've looked online at a few places, and have found sheets of foam
for various prices according to the sound reduction. Any good suppliers you
know of?
 
Thanks for any help.
 
John Formsma
Blue Mountain, MS
PTG Associate
Memphis Chapter
 
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