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#142487 - 07/18/06 04:12 PM Re: Acoustic Panels [Re: SirQuack]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13344
Loc: Iowa
The 17" x 17" x 24" Owens Corning 703 superchunks are in place and fill my front left/right corners. Hope to have the cloth frames completed soon to hide the rigid fiberboard.
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#142488 - 07/18/06 05:13 PM Re: Acoustic Panels [Re: SirQuack]
royce73 Offline
veteran

Registered: 04/20/05
Posts: 170
Loc: New Jersey
No problem - can't wait to see what those Super Chunk's look like. Whose "recipe" have you decided to follow?

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#142489 - 07/18/06 05:19 PM Re: Acoustic Panels [Re: royce73]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13344
Loc: Iowa
After talking to BrianP over the phone from Sensible Solutions, and getting some feedback on Ethan's forum thread, I ended using OC703 but also used this guide you gave me http://www.radford.edu/~shelm/acoustics/bass-traps.html from Steven Helm.

Brian said I would get much better results using the 703 superchunks compared to mineral wool or even straddling the corners with 4" material. He also gave me suggestions on treating the rest of the room, although I'm going to do a little bit at a time.
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M22-OWM22-VP100-Denon2805
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#142490 - 07/18/06 05:28 PM Re: Acoustic Panels [Re: SirQuack]
chesseroo Offline
connoisseur

Registered: 05/13/02
Posts: 4840
Loc: western canada
SirQ,
The frequency graphs on that last link did not lead me to believe this fellow's bass traps were particularly effective at doing much of anything except changing the frequency response, slightly.
If the goal there was to curb the peaks and increase the dips, then...


If the goal is to flatten that bass area, a Berhringer unit or something similar would be far more effective per dollar spent.
_________________________
"Those who preach the myths of audio are ignorant of truth."

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#142491 - 07/18/06 09:48 PM Re: Acoustic Panels [Re: SirQuack]
bridgman Offline
axiomite

Registered: 08/25/04
Posts: 5440
Loc: Bowmanville, Ontario, Canada
>>The 17" x 17" x 24" Owens Corning 703 superchunks are in place and fill my front left/right corners. Hope to have the cloth frames completed soon to hide the rigid fiberboard.

Forget the frames. Does it SOUND any different ?

Graphs, we want graphs

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#142492 - 07/18/06 10:05 PM Re: Acoustic Panels [Re: bridgman]
chesseroo Offline
connoisseur

Registered: 05/13/02
Posts: 4840
Loc: western canada
I'm with bridgman.
Show me the graphs!

Speaking of graphs, it is on my agenda to graph my own media room soon. Working on getting the recording software and a decent mic.
_________________________
"Those who preach the myths of audio are ignorant of truth."

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#142493 - 07/20/06 02:52 PM Re: Acoustic Panels [Re: chesseroo]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13344
Loc: Iowa
I actually see a good improvement to Mr. Helms results, the range from high to low dB's has been reduced across the entire spectrum. Many of the severe drops/nulls have been tamed. Not sure if you realize this is not a 1/3rd or higher octave graph like most are, this covers 1Hz increments upto 300hz. Many people miss this information from other products used.

Here is another nice article I've found.

http://www.sbrjournal.net/journalsite/archives/acoustics/Acoustics.htm
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M22-OWM22-VP100-Denon2805
Audio Nirvana

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#142494 - 07/20/06 04:15 PM Re: Acoustic Panels [Re: SirQuack]
chesseroo Offline
connoisseur

Registered: 05/13/02
Posts: 4840
Loc: western canada
Quote:

I actually see a good improvement to Mr. Helms results, the range from high to low dB's has been reduced across the entire spectrum. Many of the severe drops/nulls have been tamed.



SirQ, this is what from a scientific perspective one may call significant results without any significance.
Yes, he's changed something in his graphs since he added those traps, but tamed? Hardly. He even created a dip while eliminating another (see the 85-110Hz range).
There is still a huge spread >10dB for several points. The fact this may have decreased from a 15dB spread means little. If he had taken a 5dB dip and turned it into a 2dB dip, or at least chopped each of those major dips in half, then i would be far more inclined to agree about the significance of his efforts.
My point is that for the time, money and effort spent using these traps. he could've bought a Berhringer FD instead and made the line alot more flat. Maybe he just likes to build things for his HT, like a project that never ends. I certainly would not point anyone looking to fix up their room sonically towards ideas that really are not effective or concepts for which a great deal of work is required to utilize the idea correctly.

There is a ton of time spent on determining things like nodes and lulls in a room. People bang their heads over it for years and come up with tons of hypothetical solutions, but if this is the level of effectiveness one can expect from bass traps, sound bars, [insert name of product here], i think the solutions need alot more work.
I had a grandfather who used to like to paint his barn every year. It didn't need the paint, he just wanted to paint it.
_________________________
"Those who preach the myths of audio are ignorant of truth."

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#142495 - 07/20/06 08:31 PM Re: Acoustic Panels [Re: chesseroo]
Jordan Offline
veteran

Registered: 03/29/06
Posts: 165
Loc: Ottawa, Canada
Don't hold back Chess, tell us what you really think.

I actually read an article on bass traps / acoustic treatments etc just yesterday. I really don't know where I stand on it. Most of them are so damn ugly. I would never get away with placing those things all over the walls.

Chess, you mentioned that you were going to graph the room response. What program do you intend to use? I would like to try something like this as well.

Cheers,

Jordan

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#142496 - 07/20/06 10:09 PM Re: Acoustic Panels [Re: Jordan]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13344
Loc: Iowa
Jordan, if you talk to jakeman, royce73, and mrnomas(audioholics writer), all Axiom owners, they will tell you the positive results they received in both their graphs AND a big sound improvement. I frequent other forums where professional musicians and sound engineers hang, I have much faith in their factual statements.

And they don't have to be ugly if you have a little design talent.




Edited by sirquack (07/20/06 10:13 PM)

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