Firstly I would like to say that this post comes after many hours of reading and research, I have posted a diagragm of the room involved, FYI ceiling height is 7'6".
I have decided to use the corner traps in this sticky http://www.johnlsayers.com/phpBB2/viewtopic.php?t=4581
from my reading it seems to me that all corners of the room should be represented floor to ceiling and I will be using double thickness OC 703
Some confusing areas I have encountered are:
Q: should the traps be sealed at the perimeter for best best LF absorption (dont have the space to move them out into the room)
Q: Being that they will be right in the corner is the air space better or should I put some more insulation behind the traps regarding LF absorption.
Q: will I have problems with mids/highs being sucked out of the room with these traps.
Respectfully,
Mike
Corner trap installation questions
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amistybleu
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knightfly
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Q: should the traps be sealed at the perimeter for best best LF absorption (dont have the space to move them out into the room)
Doesn't matter; this type trap works on 1/4 wavelength being maximum absorption, and the corner location causes that distance to vary which gives it the broadband effect. LF absorption at 2' width would probably not go much below 150-200 hZ. Since the traps work by sound passing thru the fiberglass (and its inherent restrictions) a perimeter seal is irrelevant.
Q: Being that they will be right in the corner is the air space better or should I put some more insulation behind the traps regarding LF absorption.
An absorptive fill will help LF absorption and give smoother response thru the range of the trap - if you can afford it, the "superchunk" approach is proven to work better than just sheets of fiberglass across a corner (superchunks are built by cutting the material into right triangles, then stacking them in the corner floor to ceiling, and usually a restraining frame/cover over that)
Q: will I have problems with mids/highs being sucked out of the room with these traps.
I doubt it - using just the corners, you won't be covering that much of your total wall surface. If this proves to be wrong, you can cover the faces with thin plastic (under the cloth cover) which will reduce the HF absorption but will NOT lower the absorption thru the rest of the spectrum.
What WILL suck out your highs and high mids is wall-to-wall CARPET - you might wanna use this as an excuse for a Pergo floor (or stained concrete if your floor is already concrete)
HTH... Steve
Doesn't matter; this type trap works on 1/4 wavelength being maximum absorption, and the corner location causes that distance to vary which gives it the broadband effect. LF absorption at 2' width would probably not go much below 150-200 hZ. Since the traps work by sound passing thru the fiberglass (and its inherent restrictions) a perimeter seal is irrelevant.
Q: Being that they will be right in the corner is the air space better or should I put some more insulation behind the traps regarding LF absorption.
An absorptive fill will help LF absorption and give smoother response thru the range of the trap - if you can afford it, the "superchunk" approach is proven to work better than just sheets of fiberglass across a corner (superchunks are built by cutting the material into right triangles, then stacking them in the corner floor to ceiling, and usually a restraining frame/cover over that)
Q: will I have problems with mids/highs being sucked out of the room with these traps.
I doubt it - using just the corners, you won't be covering that much of your total wall surface. If this proves to be wrong, you can cover the faces with thin plastic (under the cloth cover) which will reduce the HF absorption but will NOT lower the absorption thru the rest of the spectrum.
What WILL suck out your highs and high mids is wall-to-wall CARPET - you might wanna use this as an excuse for a Pergo floor (or stained concrete if your floor is already concrete)
HTH... Steve
Soooo, when a Musician dies, do they hear the white noise at the end of the tunnel??!? Hmmmm...
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amistybleu
- Posts: 27
- Joined: Tue Aug 22, 2006 4:35 am
- Location: Denver, Colorado
Thank for the quick reply steve, regarding the superchunks how low will they go regarding LF absorption (disregard as I will look this up myself). I can already tell how high my cost would rise 
Q: do you think that my current plan will be effective for a live rehearsal space and recording with the corner traps packed with wall/ceiling fiberglass say 6" thick
Thanks for the floor info as we plan to paint the concrete and acoustically treat the ceilings/walls as I have read in many posts.
Respectfully,
Mike
Q: do you think that my current plan will be effective for a live rehearsal space and recording with the corner traps packed with wall/ceiling fiberglass say 6" thick
Thanks for the floor info as we plan to paint the concrete and acoustically treat the ceilings/walls as I have read in many posts.
Respectfully,
Mike
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knightfly
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For a rehearsal space the corner traps should be a good start; for recording, you may want to spend more time studying/calculating reverb times at different frequencies (see the SAE site for one reverb calculator)
If you record different instruments/tracks in the same space, and that space isn't NEUTRAL (meaning a pretty uniform reverb time across the spectrum) or for any reason the space has a "characteristic" sound, every track you add to the mix will add that much more "character" until you can't get rid of "that sound" - so depending on how many overdubs you intend, your tracking room sound can get REALLY important... Steve
If you record different instruments/tracks in the same space, and that space isn't NEUTRAL (meaning a pretty uniform reverb time across the spectrum) or for any reason the space has a "characteristic" sound, every track you add to the mix will add that much more "character" until you can't get rid of "that sound" - so depending on how many overdubs you intend, your tracking room sound can get REALLY important... Steve
Soooo, when a Musician dies, do they hear the white noise at the end of the tunnel??!? Hmmmm...
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amistybleu
- Posts: 27
- Joined: Tue Aug 22, 2006 4:35 am
- Location: Denver, Colorado
