Owens Corning 705 and 707 and is king!

[DanDan]

in my experience anything heavier than 40/50 Kg/m3 is a waste of money

Whoa....with respect Paul, that seems a bit too general to be useful.

To my knowledge GIK, RealTraps and all the other manufacturers of panel traps chose to use stuff in the 100Kg zone. A considered, tested, decision.

It is often overlooked that such panels, partly due to slight rigidity, act like membranes, or drum heads if you will. Particularly in corners but in other constrained areas too.

DD

[johndykstra]

WHY

would this thread have been edited and not closed and/or altogether deleted?

[Rod Gervais]

Originally Posted by johndykstra

WHY would this thread have been edited and not closed and/or altogether deleted?

John,

Deleting it wouldn't make sense from my perspective - there is some good information in here...... closing it is a different question altogether..

Rod

[harddrive]

Thanks Rod, I'll look check out those books. I can't argue that the info is already on other threads, I just need to look harder. The great thing about the internet is there is a billion pieces of information--the downside is...there are a billion pieces of information.

I guess I may have had it coming with the way I came in guns blazing--and I do apologize for letting my irish temper get the best of me--but in response to all the "haha just another idiot who won't listen." type responses let me just say this:

I used to guide fly-fishing trips in Montana and Alaska, and when I first started learning the craft in high school I read everything I could find on the subject, talked with whoever would listen and caught exactly one fish in ten days of fishing on the Bighorn River--one of the best trout streams in the world. Then I went out one day with my now-best-friend Rich who was already a guide and landed twenty.

The point is, when you are self-teaching yourself anything the biggest problem is often not knowing what questions to ask. If you came out to the river with me and Rich, I'm sure there would be plenty of occasion for us to snark to each other, "haha just another idiot who won't listen."

[PaulRain]

Originally Posted by DanDan

Whoa....with respect Paul, that seems a bit too general to be useful.

To my knowledge GIK, RealTraps and all the other manufacturers of panel traps chose to use stuff in the 100Kg zone. A considered, tested, decision.

It is often overlooked that such panels, partly due to slight rigidity, act like membranes, or drum heads if you will. Particularly in corners but in other constrained areas too.

DD

I know sometimes I'm a little bit extreme......
but really, in my little experience I had better result with lighter but thicker panels.
Talking about Bass Traps of course

[Rod Gervais]

Harddrive,

thanks - these things happen, so no biggies.....

As far as the info goes you're absolutely right - it swings both ways.

Now - as pertains to fly fishing........ fishing has never been my thing - my older bro is an avid fisherman - including fly fishing - but not me.

However - if I were to go out there and give it a try - you would probably be snarking "ha, just another idiot who can't catch fish - but damn he really listens....."

Rod

[DanDan]

Cheers Paul, I was talking about Bass Traps too.
In the classic studiotips test, a 2 foot wide straddling panel looks to be a better choice than a SuperChunk. If you extrapolate the sizes. i.e. The SSC's have better performance but are 34 inches wide. A LOT more fibre.
If you scale it up the straddling panel is an extraordinary bargain.
However, despite having no direct tests, many of us chose and recommend the SSC. In my case I recommend the larger version.

I think this is funny....

There is a DIY reflection filter thread elsewhere. Soren has warned about potential dangers of fibre or foam at such close range.
A comparison of Wavs was presented. Singer, dead room, one with no 703, another take singing directly into 703.
With narrow band Eq Soren demonstrate a strong 133Hz bump from the panel of 703.

Whaddya know?

DD

[Glenn Kuras]

Originally Posted by DanDan

Cheers Paul, I was talking about Bass Traps too.
In the classic studiotips test, a 2 foot wide straddling panel looks to be a better choice than a SuperChunk. If you extrapolate the sizes. i.e. The SSC's have better performance but are 34 inches wide. A LOT more fibre.
If you scale it up the straddling panel is an extraordinary bargain.
However, despite having no direct tests, many of us chose and recommend the SSC. In my case I recommend the larger version.



DD

From all the testing I have done at Riverbank and myself I have concluded that when you make a panel you get a spring action (if build right) at around 70 to 80hz but starts to fall off from there. When you fill the corner it will absorb lower but the spring action is not there. Either way will work, just depends what you are going for. If you want to "play it safe" then fill the corner.

[DanDan]

Great info Glenn. What density and thickness are you referring to?
Does the frequency of the absorption peak shift downwards as the panel thickens?
There are some panels which seem to be more rigid than others of similar density, and are somewhat intriguing IMHO, in terms of this spring effect.
Homatherm. Actis.

DD

[Glenn Kuras]

Originally Posted by DanDan

Great info Glenn. What density and thickness are you referring to?
Does the frequency of the absorption peak shift downwards as the panel thickens?
There are some panels which seem to be more rigid than others of similar density, and are somewhat intriguing IMHO, in terms of this spring effect.
Homatherm. Actis.

DD

It does not seem to shift. As far as density I would have to do more testing to compare. I will put that on my "to do" list.

[Holy Controller]

I hope it's ok for me to jump in and ask this question. I read through most of this but don't think I noticed anything to help me come to a conclusion on what I'm working on -

I have 4inch thick 703 floor to ceiling straddling my wall/wall corners. For my ceiling/wall corners I was thinking of doing 12 inch wide 4 inch thick 705 all the way around. Is it really going to matter?

I was hoping the 705 would be better since I would be making thinner (12 inch instead of 24) panels. The business about using different types having a negative impact has me now second guessing this. Anyone care to comment?

[avare]

Originally Posted by Holy Controller

I hope it's ok for me to jump in and ask this question. I read through most of this but don't think I noticed anything to help me come to a conclusion on what I'm working on -

I have 4inch thick 703 floor to ceiling straddling my wall/wall corners. For my ceiling/wall corners I was thinking of doing 12 inch wide 4 inch thick 705 all the way around. Is it really going to matter?

I was hoping the 705 would be better since I would be making thinner (12 inch instead of 24) panels. The business about using different types having a negative impact has me now second guessing this. Anyone care to comment?

Ther is nothing new in what you are asking. Thinner and denser of the same air flow resistance is about the same in absorption.

Andre

[Holy Controller]

OK, thanks Andre!

PS - your posts are always some of my favorites. Always very enlightening and informative. @ you too Glenn and Ethan and Rod as well. I think this is a great thread.

[Piedpiper]

Originally Posted by avare

Ther is nothing new in what you are asking. Thinner and denser of the same air flow resistance is about the same in absorption.

Andre

Notice what he is asking is maybe better described as "narrower" not "thinner". So are you confirming his thinking that using 4" thick 705 rather than 4" thick 703 would make up for using 12" wide rather than 24" wide?

[avare]

Originally Posted by Piedpiper

Notice what he is asking is maybe better described as "narrower" not "thinner". So are you confirming his thinking that using 4" thick 705 rather than 4" thick 703 would make up for using 12" wide rather than 24" wide?

Width has nothing to do with thickness. At 4" deep, 4" of 703 is the best. 705 would be worse.

Andre

[Piedpiper]

That's what I thought... just pointing out he misused the word "thinner" and wasn't sure you caught that...

[drpeacock]

So for an ignorant mother-scratcher like me who only wants to record some better-sounding drums in my spare bedroom (12 x 12 with a nine foot ceiling), what do I put up? 703? 707? How thick? On the walls and the ceiling? Thanks.

[Jens Eklund]

Originally Posted by drpeacock

So for an ignorant mother-scratcher like me who only wants to record some better-sounding drums in my spare bedroom (12 x 12 with a nine foot ceiling), what do I put up? 703? 707? How thick? On the walls and the ceiling? Thanks.

http://www.gearslutz.com/board/7713914-post3.html

4m x 5m x 2.5m room - modal resonance problem