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PostPosted: Wed Jul 15, 2009 3:01 am 
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Info on that is all over this forum; here's a recap: Basstraps need to be deep (more wool volume means lower absorption).
A cornertrap (a superchunk for example) can be a broadband. It'll absorps the whole frq range (low, mid, high etc).
By adding a pass-filter in front you can make it low-end absorption exclusively (a low-pass filter can be anything from a sheet of plastic to a wood front, slats or whatever)

So yeah, a basstrap might as well be a broadband absorber but one with very low-end absorption :)


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PostPosted: Wed Jul 15, 2009 3:18 am 
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Oh, interesting. I've read over any over again on other forums "you need to treat your room with bass traps", but it seems like most of these are using broadband traps for all the applications I thought you used bass traps for. So when would you use a plain bass trap over a broadband trap?


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PostPosted: Wed Jul 15, 2009 8:17 pm 
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Simple, your room needs to be balanced. Too much broadband absorption will kill mids and highs in your room.
You see low-end is harder to trap. So broadband will absorb less low than high end frq. In that case your room is out of shape (acoustically).

By adding a filter in front and make the trap work only on low-end, you'll keep the balance. Generally speaking, if you dress up your room with corner and wall absorbers, you should use the corner only for low-end trapping. If you only have corner devices you might wanna leave it broadband. So, it's just a matter on how much trapping devices you have in your room.. sort of.

If you check out this recent build I did: viewtopic.php?f=10&t=12321, you'll see what I mean. The corner traps have a plastic sheet in front to filter high frq. The wall panels don't. You'll also see the difference in depth. The corner traps have deeper wool than the wall panels (which are mid/high broadband)


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PostPosted: Thu Jul 16, 2009 9:07 am 
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benirose wrote:
Oh, interesting. I've read over any over again on other forums "you need to treat your room with bass traps", but it seems like most of these are using broadband traps for all the applications I thought you used bass traps for. So when would you use a plain bass trap over a broadband trap?



I keep on saying that the term bass trap is incorrect. People wrap some insulation in a cloth bag and call it a bass trap It is not a bass trap - just an absorber.

A bass trap is like the section under a soffit mount where the bass gets in via the port and is "trapped" in there and absorbed by the hangers.

A bass trap is like the area above a timber ceiling where the bass frequencies are trapped and absorbed by the hangers.

Like this picture that shows the hangers before the ceiling was added.

Image

Here's the ceiling added with the ports down the side to allow access to the ceiling trap

Image

I'm sorry - but I just can't accept a sheet of insulation wrapped in cloth being called a Bass Trap. It's an absorber.


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PostPosted: Sat Jul 18, 2009 5:15 pm 
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Thanks John, I really appreciate you clearing that up for me!


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PostPosted: Mon May 31, 2010 4:41 pm 
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A pair of questions I hope haven't been answered nigh to death. Feel free to answer with a link if that's faster.

I'm building a number of broadband absorbers using both 4"(in corners) and 2" (other areas) Rockwool insulation.

They are all built on a 1X4 frame, which seems to be a common theme here.

Some people perforate the 1X4's to let the sound access the insulation through the sides, either cutting holes, like jbassino's design, or actually cutting out a portion of the frame with what appears to be a jigsaw like Jakeman.

1)How much difference does it make to do this? Is it worth the extra effort?(mine would be covered in fabric so the looks don't matter).

And I'm reading that there is benefit to mounting the panels away from the wall, but I've yet to find information to determine how far.

2) Is there a reasonably simple way(read:able to be executed by newbies and other mortals) to estimate how far from a wall a panel should be?

Thanks
Keith

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PostPosted: Thu Aug 19, 2010 5:31 pm 
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Here's my corner panels, i did them after reading the dairies on this thread, hope you like them.

http://www.johnlsayers.com/phpBB2/viewtopic.php?f=3&t=14696


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PostPosted: Sat Jan 12, 2013 1:15 pm 
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Nice post. Well done Ro. Thanks for sharing it. It was good and helpful.

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PostPosted: Mon May 25, 2015 3:30 pm 
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Ro wrote:


Nice collection share by you within [STUPID SPAM LINK REMOVED BY MODERATOR: SPAMMER BANNED AND BLOCKED PERMANENTLY] I really was looking for such brief post from weeks. Thanks


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PostPosted: Tue Jul 17, 2018 2:33 am 
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This is very helpful! Appreciate you doing the research. Thanks for sharing!


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PostPosted: Mon Sep 10, 2018 2:11 pm 
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hello........
A sticky would be nice- especially considering the search function doesn't work(or at least didn't the last time I used it)
ClitoromegalyHyperspermiaProstatomegalyDermatophagia


Last edited by Tirtho111 on Sun Oct 07, 2018 5:18 am, edited 1 time in total.

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PostPosted: Tue Sep 11, 2018 12:16 am 
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Quote:
especially considering the search function doesn't work
In what way does it not work? I just tried it, and it is working fine here. What were you searching for, and what results did you get?

- Stuart -

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PostPosted: Fri Oct 05, 2018 2:07 am 
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Wonderful job Ro!


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PostPosted: Thu Jan 24, 2019 11:14 pm 
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Creating a good Recording studio/room can be done by in a number of ways, the options available are vast. Basically adding Acoustic Treatment to the room makes all the difference. There are a number of places that offer services and products that help you get the result you desire. [SPAM LINK DELETED] or boards, ceiling tiles, etc can be used to reduce the reflection, reverberation of sound, you can visit the link to get a good idea of the various options available.

ACTUALLY, ON SECOND THOUGHTS, YOU CAN'T VISIT THE LINK BECAUSE IT WAS DELETED BY THE MODERATORS DUE TO VIOLATING THE FORUM TERMS OF SERVICE

(And if you think that you can create a studio by putting acoustic tiles on the walls, yo are DEFINITELY in the wrong business...)


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PostPosted: Sun Jan 27, 2019 12:17 am 
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I am so happy being a part of this forum. I had many issues about acoustic treatment and acoustic panels in the designing of my recording studios until i finally found a lasting solution that is professional, economical and fantastic at [FIFTH SPAM LINK FROM SAME PERSON IN JUST A COUPLE OF HOURS, REMOVED. SPAMMER BANNED. SPAMMER'S EMPLOYER ALSO BANNED AND BLOCKED FROM FUTURE ACCESS TO THE FORUM]

cmbaziira


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