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room problems

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room problems

Postby axeman_ukl » Mon Jul 09, 2012 7:41 am

i have an attic room with a slopped ceiling its 11.5 foot by 10.5 and 8.3 foot high at its highest point ,diagram included

room treatment questions

is a super chunk trap 600mm across its front surface going to be better than a 600mm wide trap 6" in thickness spanning the corner

there are three wall-ceiling areas in the section marked "B" that i was going to put bass traps on ,will to many bass traps kill the high end ?

is it better to plaster board the section marked "A" off in the diagram and fit a corner bass trap to make that side of the room more symmetrical ?

would it be better to remove the other alcove completely and fill it with riged insulation and put a fabric cover to seal it off and not have a corner trap ? Image Image
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Re: room problems

Postby Wiseau » Mon Jul 09, 2012 10:32 am

How did you manage to draw on the screen like that?
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Re: room problems

Postby axeman_ukl » Mon Jul 09, 2012 11:04 am

Wiseau wrote:How did you manage to draw on the screen like that?

wacom dawing tablet cte-640

can be found on ebay they dont go for much these days the bamboo range has replaced them
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Re: room problems

Postby Helmutcrab » Tue Jul 10, 2012 2:08 pm

Hi Axeman,

I have a similar thread next to yours and am a relative novice with acoustics but i can have a crack at answering some of your questions to get the ball rolling and someone more knowledgable can then correct me if I've got it wrong.

A full length 6" deep corner trap should be more effective than a super chunk if you also use a 4" deep by 12" wide column behind it, but not touching it (i.e. cut a 4" 1200mm x 600mm slab in 2 -length ways, and put one on top of the other). The top panel may require a base support if using 45kg/m3 density.

I think if you are intending to use insulation slabs covered in fabric as bass traps then these act as broadband absorbers and will reduce the high end along with everything else, helping to reduce room problem frequencies. If you were to cover a lot of the rooms surface with absorption material it will greatly reduce reflections. In a small room i don't think it is possible to have too much bass trapping and if you really need some reflections i suppose you could use foil backed slabs facing the foil into the room. Don't do this at the mixing area of the room though as it is best to have a reflection free zone here. Remember that where ever you don't have absorption there will be reflections anyway though. It depends on how much absorption you intend to add and what your recording needs are (early reflections needed ?) and how comfortable you are mixing in a dead room (if you cover a lot of the room).

What is the room like - Have you identified problem frequency areas ? (the sos bass staircase can help here or software if your good with that)

Where in the room you are mixing ?

Does the roof slope from the right side wall (wall parallel with bottom of velux window) to the left (where joist is) ?


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