the lofty ideas i have aren't really that lofty. not compared to real
studio construction. i have a pretty well regarded book by a guy who
has done studio construction for over 30 years. what i'm describing is
very different from standard construction but old hat for studio
construction.

the basic concept is we are setting up a mass,spring, mass system.
outer drywall, air, inner drywall. if you had something like 24"
cement not much sound would make it through. if its sealed right that
is. so more mass = more sound isolation. so the sound has to move the
interior wall then cause the air pocket to compress (like a spring)
which then moves the exterior wall. this is a very efficient way to
lower transmission. its not big secret in studio construction.

i couldn't agree more about doing it right. and being cautious. that's
why i've read a few books and am taking come construction classes. the
last thing i want to do is do it wrong.

i don't think i'm trying to take this to obscene lengths. my area has
pretty quiet ambient levels on a A weight scale, under 60db. so if i
could get an STC of 50 that would be great. that's obtainable with
what i'm doing. EMF interference isn't a goal.

i'm reading though the permit process in my area to see what i'm in
for. at some point i'll probably look at building code.

i'm in san francisco.

sure i'll take the referral, thanks.