Thanks for sending me an email with your question and thank you Chris for referring Mike to me. I'm going to reprint my email response to Mike for what it's worth. It's an interesting question and one that many homebuyers fail to ask until it's too late and they are experiencing problems. The most onerous type of noise in a home, in my experience, is overhead noise. There is something especially oppressive about it. There are a lot of very good ways to prevent unit-to-unit sound transmission during construction and there are also some more difficult and expensive methods to address is ex post facto. Here's my answer to Mike.
Thanks for your question. I don't know if I can add anything special
to your concern about sound transmission in a high rise condo.
If I were looking for a place where I could practice my piano w/o
bothering neighbors or generating complaints, I would present those
concerns to the building mgmt. personnel of the building that
They are the folks that field noise complaints and should have a
pretty good feel for the ability of their units to contain noise.
The most difficult kind of noise to control is point impact sound.
That is not a problem obviously with your piano music. Is it a problem
to have your piano on a thick rug? Would you consider perhaps having
some fabric/carpet wall hangings to also absorb sound?
Most high rise condos are similarly constructed with reinforced
concrete floor/ceiling assemblies, so there may not be much difference
in the STC ratings. One exception to that would be in buildings that
have dropped drywall ceilings in addition to the structural concrete
ceilings. I'm not sure which, if any, of the buildings you are
considering may have that additional layer of sound absorption.
Feel free to give me a call anytime to discuss further. Or if you
prefer, send an email. There are also sound absorbing drywall boards
available that could, conceivably, be installed over the concrete
ceiling of a condo unit or living room. One such product is called,
"QuietRock" their website has a lot of info on controlling sound.