Gap to Frequency

Great forum John- Kudos!!! I'm renovating a studio and want to make certain parts of the left and right walls (2.5ft-3ft from the floor in a few areas) absorb low mid freqs through the planked wood gaps. There is 2" compressed fiberglass and fabric behind the plank wood. I've been digging around for the gap to frequency tables and cannot find it now....errrrrr. Could you provide gap widths in relation to the frequencies being absorbed? ( in inches or if its more accurate to use millimeters) Here's an example: Thanks POB

Here's the formula Robert - try this: http://www.johnlsayers.com/phpBB2/viewtopic.php?t=1363 cheers john

Thanks