vocal booth acoustic treatment

Hey ! :lol: I have changed the depth of slats and found a great changes in calculation. See here..... Standard Slat Width=6" Air Gap= 3" to 6" 1. 200-256Hzs :arrow: Slat Depth:75mm Slot Width: 6mm 2. 238-288Hzs :arrow: Slat Depth:50mm Slot Width: 6mm 3. 289-359Hzs :arrow: Slat Depth:75mm Slot Width: 12mm 4. 335-403Hzs :arrow: Slat Depth:50mm Slot Width: 12mm 5. 371-459Hzs :arrow: Slat Depth:75mm Slot Width: 20mm 6. 428-515Hzs :arrow: Slat Depth:50mm Slot Width: 20mm 7. 486-598Hzs :arrow: Slat Depth:75mm Slot Width: 35mm 8. 594-708Hzs :arrow: Slat Depth:50mm Slot Width: 40mm 9. 687-814Hzs :arrow: Slat Depth:75mm Slot Width: 45mm Is it right? Cheers

Yeah - it's a pretty deep slat but that will work. With slats that deep i.e. 75mm (3") x 150mm (6") and 50mm x 150mm alternating it looks cool if you run them vertically and it becomes a sort of diffuser as well :) I did something similar at Guruland where we used 6" x 2" with the 6" as the depth and the 2" as the slat face. cheers john

dear john, i am currently building the wideband slot resonator wall as per the final plan.... just want to confirm the frequency range, i think for vocal 200-800hzs is fine? krish

yup - that's fine. cheers john

John i have just complete building my basic structure for the vocal studio, it includes 2 wide band slot resonator wall tuned for 200-800Khz. The contrasting walls have a sheetrock finish and insulation inside, and same sheetrock on ceiling and insulation inside. I am planning to lay a carpet on floor, what about the ceiling and sheetrock walls ? these should be covered by some cloth or i leave it simply painted? I am also having a heavy door in the booth and afraid that wooden door will be a subject of any acoustical problem ? Krish :roll:

The slots are going to bring down the verbtime of the low-mids - you also need to bring down the highs to match it. I'd put 703 type insulation on the other walls and the ceiling at around 50%. cheers John

Great! If i am laying a carpet then it is required to put some cloth covered exposed insulation on ceiling also? I have got some good pillow coveres with a artistic canvas on it , i am thinkint to fill with insulation and hang on some of the walls, will give a good look also ...... opinion? krish

Yup - that will look cool - just make sure you get a good insulation - rigid fibreglass is better if you can get it where you live. cheers john

thanks john... i have just completed with my vocal room that includes: 2 slat resonator walls -tuned for 200--800 hzs remaining walls -with high frequency absorbation (exposed Foam+cloth) ceiling -(exposed Foam+cloth) if you give me a permission ...... can i post some pictures krish

sure Krish - you can post pics - send them to me (Keep them small files) with some text to go with each pic. cheers john