Urgent Help

Hey I am Laura ! Its' great to experienced lots of resources on such a important topic "Studio Design and Acoustics" Thanks to the Founder. I have a very small and room with identical dimensions for my drum tracking, i was initially thought that i just needed a room to accomdate my drum thats all but after going through lots' of info on design topic i found that all what i have done was bull shit. My room is around 108Hx114Wx110L ", i have a hardwood floor and sheetrock ceiling with mineral wool insulation, i would like to record my drums with my tiny digital setup. What type of treatment it required? Help me if you can. Laura

Laura - click on the John Sayers Productions logo in the top right. Then click on The Recording Manual. Then look for absorbers ansd read up on them. cheers john

Well i have read your manual (Great Text "*"), due to the critical size of my room my major problem is to resolve 62 Hz, 124 and 186 ... must be i have to use some broad band absorbers. ny opinion? laura

Laura - it depends what sort of drum sound you want. Do you want it tight or loose, live or dead. The frequencies you mentioned are low-mids which is what you'd expect with the treatment you've got now. The insulation abosrbs down to around 250Hz tapering off as it goes. You need an absorber for the low-mids which you can do with a slot resonator. Go to my main page and click on Wall Units. cheers john

i have sketched a bit, wonder if it works..... laura

Yes - that's ok - you don't need the left absorber though as you've paralleled the walls again. Try with two to start with. You could put some straight insulation on the other walls. cheers john

is such a tiny room 108Hx114Wx110L for drum recording. I am intended to resolve these frequency 62 Hz, 124 and 186Hzs using slot resonator, i already have a wooden floor as a reflective surface. is there nything more to be taken care. i am planning to refurbish it soon so a bit concern for proper tratment. :shock: :roll:

Laura - you could put some of ethans bass traps http://www.ethanwiner.com/default.asp on one of the walls alternating with some high frequency absorbers. You must bring down the reverb time of the room or it will sound boxey. What's on the ceiling?? cheers john

:idea: well i was reading some resources on net and found that my ceiling definitely treating some bass frequencies as i have a semi peaked ceiling in which two parallel sides are angled. it is ike a hut ceiling but the centre it not totally peaked. i am having two horizontal corners on ceiling which are giving me 19" air gap and filled with 3-4" mineral wool insulation.It is finished with sheetrock. I think having wooden floor is preferable in drum room as its' a reflective surface. laura

Hello John! i think i must put ethans bass trap on the left side of my room....very confused what to do. Help me out.

I'd go without anything on the left wall except insulation, add your two slot walls and see what it sounds like. cheers John

:lol: so it is final to put two wall as slot resonator tuned for 62 Hz, 124 and 186 frequencies, left wall with just insulation and a wooden floor. I think by such combination i get some live enviornment for my drum tracking. love

laura - the moment you put in those slots you stop all the parallel walls and those frequencies you are concerned about go out the window. cheers john

fairly speaking, i cant get what exactly you are trying to taken care of.

Ok - what you have now is a room with sheetrock walls and ceiling and a reflective floor. The frequencies you are concerned about are probably related to the parallel wall surfaces. What I'm proposing is that you build two slot resonators that are angular, thus removing the parallel wall factor plus they will absorb the low-mid frequencies. (150Hz - 500hz.) Whilst they absorb the low-mids they also reflect or diffuse the high freqencies. Next by putting insulation on the remaining walls you will absorb the high frequencies down to meet the low-mid absorbers thus bringing the total reverb time of the room down. cheers john

:D Great ! So here are the final consideration : 1. Two slot resonator on angled wall tuned from 15-500 lowmid 2. Remaining walls with direct insulation and finished with sheetrock. :arrow: can i build this?

1. Two slot resonator on angled wall tuned from 15-500 lowmid

Two angled slot resonators tuned from 150hz - 500hz

2. Remaining walls with direct insulation and finished with sheetrock.

No - remaining walls have insulation exposed and covered in cloth. cheers john

Great....... hope i will complete it soon.... well by such combination of construction i will get a good isolation or not? i think the floor and ceiling will look after the sound proofing.

Laura- this is purely internal acoustic treatment - it will have no effect on sound isolation - that's an entirely different story. cheers john

Thanks. I have calculated and tuned slot resonator like this for 150Hz-500hz : Slat size for all =6x1" Wall (Angled) depth is: 76.2 to 304.8 mm 150hz-256hz : 6mm Slot Width / 75 mm Slat Depth 252hz-403hz : 12mm Slot Width / 50 mm Slat Depth 398hz-568hz : 18mm Slot Width / 25 mm Slat Depth I have one question that i have to to covered whole wall with this is recursive manner or just once? John do you think this calculation is fine? Laura Lager

I haven't checked it but those figures look correct to me. Yes you just repeat the sequence. also check out this thread about the same thing http://www.homer.com.au/phpBB2/viewtopic.php?p=813#813 cheers john

as you already know that my room is quiet identical.... i have to take care of the modal build up also or its' ok to bring down the reverbation time..... laura

yes - this treatment will bring down the reverb time cheers john

:D Great. Starting construction from today.... Laura

Laura, make sure you check out S.Productions pics at http://johnlsayers.com/Studio/index.htm for some construction ideas. cheers john