cotton bass traps

bigo · 4th September 2006

I know that this has been discused many times but I would like to ask how thick should be a panel filled with cotton material of 100kg/m2 (6pfc, I think),first for a bass trap and second for mid-hi absorbtion.
I want to use cotton instead of fiberglass and that's the only material I can find in Greece.Is there a diference between cotton products exept from density?
Thank you in advance ,I have learned so much from this forum!...
Kostas

Ethan Winer · 4th September 2006

Kostas,

> how thick should be a panel filled with cotton material of 100kg/m2 (6pfc, I think), first for a bass trap and second for mid-hi absorbtion. <

4 inches (or more) for bass trapping, 2 inches for mid/high frequency absorption.

--Ethan

bigo · 4th September 2006

Thank you Ethan,
I feel very lucky to be able to receive answers of people who realy know!
-Kostas

bpape · 4th September 2006

Kostas.

If you have the luxury of going thicker, you can even use less dense cotton. Once you get to about 6" or more thick, 3lb equivalent will work pretty well. Solid corners can suffice with even less density.

Bryan

bigo · 4th September 2006

I'm afraid I don't have that kind of luxury...Is there any problem If I use for all (bass traps and mid/hi absorbtion)4 inces panels or I must stick to 2 inches, for side walls and ceiling?
Thanks for replying...
Kostas

Glenn Kuras · 5th September 2006

You can use 4" for side walls. It will help with bass trapping also.

Glenn

bigo · 5th September 2006

Thanks,
I think I will do it this way!
Kostas

jerbtracey.com · 5th September 2006

Sorry to hijack this thread, but has anyone used sheep's wool for sound insulation?

Jerb..

Glenn Kuras · 5th September 2006

Quote:

Originally Posted by bigo

Thanks,
I think I will do it this way!
Kostas

One think you will want to do is space the panel off the wall 4". That will increase more low end absorption.

Glenn

bigo · 5th September 2006

Do you mean 4inches panell plus 4 of the wall?I wish I had that kind of space...My room is realy small!
Kostas

Glenn Kuras · 5th September 2006

Quote:

Originally Posted by bigo

Do you mean 4inches panell plus 4 of the wall?I wish I had that kind of space...My room is realy small!
Kostas

Yes you really do want to space them off the wall if you want it to work on the low end.

Glenn

macr0w · 5th September 2006

Quote:

Originally Posted by jerbtracey.com

Sorry to hijack this thread, but has anyone used sheep's wool for sound insulation?

Jerb..

Does hanging some nice persians on the wall count?

tINY · 5th September 2006

only if you can hang it in front of an open box that is filled with 4" or so of insulation....

-tINY

4th September 2006	#1
bigo Gear Head Joined: Feb 2006 Location: Athens,Greece Posts: 41 Thread Starter	cotton bass traps I know that this has been discused many times but I would like to ask how thick should be a panel filled with cotton material of 100kg/m2 (6pfc, I think),first for a bass trap and second for mid-hi absorbtion. I want to use cotton instead of fiberglass and that's the only material I can find in Greece.Is there a diference between cotton products exept from density? Thank you in advance ,I have learned so much from this forum!... Kostas

4th September 2006	#2
Ethan Winer Gear Guru Joined: Oct 2002 Location: New Milford, CT, USA Posts: 12,334	Kostas, > how thick should be a panel filled with cotton material of 100kg/m2 (6pfc, I think), first for a bass trap and second for mid-hi absorbtion. < 4 inches (or more) for bass trapping, 2 inches for mid/high frequency absorption. --Ethan __________________ Ethan's audio book is now available!

4th September 2006	#4
bpape Lives for gear Joined: Jul 2005 Location: St. Louis(Wildwood), MO Posts: 764	Kostas. If you have the luxury of going thicker, you can even use less dense cotton. Once you get to about 6" or more thick, 3lb equivalent will work pretty well. Solid corners can suffice with even less density. Bryan __________________ I am serious, and don't call me Shirley Bryan Pape Lead Acoustical Designer GIK Acoustics

5th September 2006	#6
Glenn Kuras Gear Guru Joined: Jul 2005 Location: Atlanta, GA Posts: 12,007	You can use 4" for side walls. It will help with bass trapping also. Glenn __________________ Glenn Kuras GIK Acoustics USA GIK Acoustics Europe 770 986 2789 (USA) +44 (0) 20 7558 8976 (UK) See the NEW Scopus Tuned Trap

5th September 2006	#8
jerbtracey.com Gear Head Joined: Jul 2006 Location: Armidale, NSW, AUSTRALIA Posts: 35	Sheep's Wool Sorry to hijack this thread, but has anyone used sheep's wool for sound insulation? Jerb..

5th September 2006	#13
tINY Gear Guru Joined: Jul 2004 Location: Orygun Posts: 10,234	only if you can hang it in front of an open box that is filled with 4" or so of insulation.... -tINY

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