Tubes vs. Panels?

Well, the interesting thing is that I didn't actually get to see or use the software -- I posted a thread in the audio asylum about my trouble, and this fellow in Singapore replied with all these subsidiary questions and requests for photos and everything. I thought he was planning to hire someone to break into my house, or something.

And then, about a week later, I get this e-mail from him with this very professional looking CAD diagram, that says: Place four 16" tubes exactly here, here, here, and here. Then place three 13" tubes exactly here, here, and here. I had no idea that different diameters, different shapes, even different heights made such a big difference -- but according to this guy (and his program) they apparently do.

I'll go back through the threads and try to find the guy. I think at least some of our correspondence was by private e-mail, so those might be easier to find -- or else gone altogether, which is the other thing that happens to e-mail.

02-10-08: Nsgarch
"Dave, please share your source for that information"

I don't recall where, or if, I read it at any one source. I have known it for a very long time? Any pro acoustical site that provides "a lot" of free acoustics reading material should have good info if you dig around...start at (Realtraps) and (Rives). Also, the Audioasylum (acoustics forum).

Nothing magnetic going on with sound trapping. It's a surface area thing. A larger target, will absorb more than a smaller target.

Dave

Dave, my understanding is that tube traps eliminate excess bass energy by 'trapping' it within a (half open - half solid) tube. The energy then dissapates as it resonates up and down the tube -- sort of an organ pipe in reverse. Panels do not work that way.

Nsgarch you said:
"my understanding is that tube traps eliminate excess bass energy by 'trapping' it within a (half open - half solid) tube."

I have made Tube traps out of Large 12" pipe insulation (made of rigid fiberglass, 6 ft tall sealed all seems and top and bottom openings.. Never put anything inside of them. Made four smaller ones too, but didn't really make much difference...

What do you mean by half solid, half open? one end left open, i understand that..but one half made solid? how do i make it solid? Fill it full of insulation?

Maybe this is why my traps don't seem to work, i didn't make em right?

Thanks
Mike

Mike I've sent you an email. There are many DIY tube trap sites you can find searching Google.