maarvold wrote on Sat, 28 April 2007 14:40 |
Barry, I 'feel your pain'. There's also a guy I came across on the 'net who says the formula in the Everest book, and also on virtually every on line Helmholtz calculator, is wrong. It fails to take some gray area/difficult to calculate parameter into account (like the friction of air in the mouth of the slot or something like that). Here's some info about it, although it's not the specific page I was looking for: http://forum.studiotips.com/viewtopic.php?t=94 Fran: care to comment? Thanks in advance. |
Barry Hufker wrote on Mon, 30 April 2007 12:18 |
We have built membrane absorbers before with success. This effort was to try something different. Barry |
Barry Hufker wrote on Mon, 07 May 2007 20:01 |
Rick, And the boost is highly significant at these two frequencies -- at least 12 dB. I would even allow 4 dB for the speaker (which to my mind would be a pretty shitty speaker), but I have to count at least the remaining 8 to the room. Barry |