Wooden blinds vs cellular shades for acoustics


Standard old school advice for large window acoustical treatment seems to be "heavy draperies". Some cellular shades (Hunter Douglas, Bali) have high factory-rated NRC (0.60 or better). That's about the same for what little I've found for draperies.

Recently, I heard that partially-open wooden blinds are best for acoustics, acting through diffusion, rather than absorption. Opinions? Experiences?

Thanks
leeofb
Hi
I've treated my main picture window and smaller sides with wood shutters,(solid, no slats). Made a huge difference over blinds or drapes. I bought unfinished ones from Lowes, staind them to match my other wood surfaces, then treated them with larch resin to try and give them the best reflective surface I could find, sonically much better than regular poly. It's great. Look up mother of tone website and you'll see what I'm talking about. You can get the varnish from Sinopia. Also, since glass is not our sonic friend, I'm using Marigo dots on the windows, and it is a fantastic tweek. That might interest you as well. Good luck. If you really want to make your room sound great, it's worth it.
I'm having a problem with a 5'x6' standard double glazed window (1/8" glass). The sucker rings at midrange frequencies. Yech! I've tried putting powerful 2" magnets on both sides to keep it from resonating (little help), I have thick velvet curtains with backing on them in front (still rings). The people who install plastic films on windows doubt it would help. I'm talking to the window people about getting laminated glass replaced in - but that will likely be costly. I don't know about the Marigo dots - can't imagine they would be much better than the magnets. This could be an expensive fix, as the glass they use is thin enough to be like a drum membrane.
Peter_s, is the window mounted inside a frame? If so, I wonder if inside-mount blinds (high-NRC cellulars or partially-open wooden) would reinforce the curtains sufficiently to stop the ring.
I have a window wall measuring 8'x 18' opposite my speakers with four panels of metal mini-blinds. I alternate the blinds panels with slant-up and slant-down hoping to break-up and redirect reflections.
I've also placed several 2" squares of DynaMat on each of the four double-pane windows in hopes of reducing glass vibrations.
I have no idea if this works although it sounds reasonable that it should.
Hi again, yes, the dynamat is a very cheap alternative to the marigo dots...it did work on my windows. I bought mine off ebay, cut it into 2" circles, and placed it an inch out from the corners in every corner. It works. The Marigo's do a much better job, don't ask me how, you should call the Marigo guy, he's doing great business, he seems to have hit on a very successful product. plus, money back guarantee. look at his website, or check the review on 6moons. I still have skeptical friends,(who have issues in general) but me and my friends with ears are totally sold. I would think it's a much better alternative either way than getting new windows. I did, but not because of that, replaced 110 yr old ones with new ones, and the dots improved the new glass as well. If you like your glass, its sealing properties and all, just get dots.