Hi Paul, Foam rubber is accoustically transparent. I would recommend ordinary fiberglass insulation held in place with a dark tightly woven material. The more glass wool you use the more sound will be absorbed. The factor is 1.6 for speaker cabinets filled with glass wool (i.e. they appear acoustically "bigger" by 1.6 times their interior [cubic] volume) The floor is probably also shaking from energy losses thru the legs of the piano. Place it up on "very hard" caster cups--glass or other similar material would be good--so the energy will "bounce" back up the leg into the instrument. A simple thick carpet under the instrument (with extra layer under the caster cups) will also help. At 07:39 AM 09/17/2001 -0700, you wrote: >One of my customers is a piano teacher who lives in an apartment condo. >A new owner just moved into the apartment under her and is complaining >about the noise. The piano is a 1919 5' Drachman grand. I suggested >closing the area under the soundboard with foam rubber and keeping the >lid closed. She wants me to get the material and do the work. It's the >first request of this kind that I have had. Any suggestions? > >Paul Larudee > > Regards, Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T. mailto:drose@dlcwest.com http://donrose.xoasis.com/ 3004 Grant Rd. REGINA, SK S4S 5G7 306-352-3620 or 1-888-29t-uner
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