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Post by liffy99 on Nov 16, 2017 10:28:09 GMT
Just made a couple of these - braced wooden frame, 50mm rockwool, calico fabric with small air space built in. Going to do some more.  |
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Post by zippy on Nov 16, 2017 10:37:24 GMT
Where did you get the design from, and what frequencies are they aimed at ?
I have need of some bass traps but I can't find any ready-made that will fit into my room layout.
Any chance of you posting a photo ?
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Post by liffy99 on Nov 16, 2017 10:40:36 GMT
Just made it up based on the size of rockwool panels. Approx 4' x 2'
Rockwool is meant to have very good sound absorbing properties but you would probably go for thicker (eg 100mm) for bass traps.
These are intended to tame mid and high frequency reflections from the rear of the dipole electrostatic (which would normally sit about a foot higher).
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Post by Tim on Nov 16, 2017 10:41:52 GMT
Very unobtrusive, I like them a lot  |
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Post by MartinT on Nov 16, 2017 11:03:56 GMT
I have need of some bass traps but I can't find any ready-made that will fit into my room layout. Have you looked at GIK's range? |
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Post by liffy99 on Nov 16, 2017 11:21:14 GMT
Helps that the walls are painted with Dulux 'natural calico' |
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Post by zippy on Nov 16, 2017 14:47:24 GMT
I have need of some bass traps but I can't find any ready-made that will fit into my room layout. Have you looked at GIK's range? Yes their bass traps are about the closest to what I need (namely tall thin as I can't fit them into the corners) I haven't managed to trawl through all their information yet so I'm not sure how effective they'd be at 50-100 Hz They're not expensive as these things go but a bit of a gamble as I'm not going to know if they work until I've installed them. (and of course they have to pass the WAF) |
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Post by Deleted on Nov 16, 2017 14:54:53 GMT
They look great! My acoustic foam blocks are stuck directly to the wall and are a much more obtrusive purple. Still, they have turned an un-listenable room into an Ok one.
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Post by julesd68 on Nov 16, 2017 15:18:44 GMT
Have you looked at GIK's range? Yes their bass traps are about the closest to what I need (namely tall thin as I can't fit them into the corners) I haven't managed to trawl through all their information yet so I'm not sure how effective they'd be at 50-100 Hz They're not expensive as these things go but a bit of a gamble as I'm not going to know if they work until I've installed them. (and of course they have to pass the WAF) I met one of the guys from GIK at the Stylus Vinyl show in Manchester earlier in the year. Extremely knowledgeable and friendly, I would just give them a call to discuss ... I thought some of the designs looked fantastic too ... Certainly on my shortlist of 'upgrades' ... |
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Post by liffy99 on Nov 16, 2017 16:24:59 GMT
There's a scale of sound absorption properties for various materials somewhere - can't recall what it is named.
eg I think 50mm rockwool is pretty much 100% absorbtion over 500Hz and drops off below.
Seem to remember about 70% at 250Hz but just 25% at 125Hz and so on.
One thing to remember is not to pack it tightly - this reduces its effect.
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Post by MartinT on Nov 16, 2017 17:16:42 GMT
The centre panel in this photo is a GIK, it's just as good quality as the PicturePanels either side of it and half the price.  |
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Post by liffy99 on Nov 19, 2017 14:55:17 GMT
Obviously Photobucket has become a liability ! So here's the photo again  |
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Post by SteveC on Nov 20, 2017 9:37:23 GMT
Obviously Photobucket has become a liability ! So here's the photo again Very tidy! Well done! |
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Post by beatsbooster on May 11, 2018 23:34:54 GMT
www.acoustic.ua/st/web_absorption_data_eng.pdfHere is a useful table of absorption coefficients, But if you want performance below 125 you need active bass traps, i mean membrane resonators limp-mass absorption or helmholtz resonators. There is a company called Acoustic Fields that makes real bass traps that perform below 125 Hz, their technology is based on activated carbon and diaphragmatic absorption.
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Post by MartinT on May 12, 2018 0:30:05 GMT
Thanks for that. I have an Acoustic Sciences SubTrap, originally made for the REL Studio II subwoofer I used to own. I still have it in the corner of my room.
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