tuning a room with helmholtz resonators?

[waynedorell]

hi.
have a small home studio room.
room dimensions:
W: 7'-7"
L: 15'-1"
clg: varies 7'-3" to 7'-7"(short dim)
one long wall field stone, floor to clg. with 48" door opening relatively centered.
other 3 drywall with windows across entire walls.
sill 37".
windows:(8 total. 4 on long wall, 2 each on sides) H 38" W 36"
approx 4" between each window.
clg drywall.
floor concrete.
i've attached rough floor plan.

hear pretty big bump around low musical D.
that was worst offender, at least.
would like to control it.
read about helmholtz resonators.
not sure how to go about making one specifically for those freq.'s.
not concerned with isolation, just a more balanced monitoring environment.
would like to not have permanent structure if possible.
have decent carpentry skills.
budget is whatever, from what i've read build cost is reasonable.
thanks...

[FriFlo]

Hi Wayne,

I am not an expert (yet), but I can tell you that much, that tuning a HR is not a trivial task at all! It yields so many unpredictable results, that it only makes sense for very experienced studio builders, if anything.
But you can generally smooth out the modes with simple porous absorbers. If you don't want to make the build a yearlong endeavor, I would recommend simple panel traps and super chunks in corners. On the results you can decide, if you need to achieve more.
For more detailed answers (from me or the more experienced folks) you would need to provide quite a lot more information. Please read the stickies. On a side note: people in this forum are a little pissed of, if people don't read the stickies, what you obviously didn't (location??).
Cheers!