Spray On Acoustic Treatment?
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URL: https://forum.speakerplans.com/forum_posts.asp?TID=98499
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Topic: Spray On Acoustic Treatment?
Posted By: brokenjoe
Subject: Spray On Acoustic Treatment?
Date Posted: 12 May 2017 at 8:46am
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Does anyone know of a spray on / or a way of treating something to help with room acoustics? other than serge drapes / but along those lines i want to treat a ceiling without lowering the height of the venue
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Replies:
Posted By: bob4
Date Posted: 12 May 2017 at 10:04am
| Some type of porous expanding foam might work, but you would need loafs of it. With acoistics there is no free lunch, you always have to apply a layer of absorbant material with a thickness of 1/4 wavelength. For example to damp above 1 kHz, you need at least 6 cm of material, for 500 hz and up 12 cm, etc..... |
Posted By: kevinmcdonough
Date Posted: 12 May 2017 at 10:58am
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hey depends on what frequencies your looking at, but unfortunately there's no cheating the laws of physics. If its just higher frequencies you're looking at, then just some carpet tiles/thin foam/material on the roof will make a big difference. However as you go lower and lower, you need thicker and more dense materials to absorb the frequencies properly. The only exception might be if it's a particular frequency or narrow band of frequencies you're looking at, a standing wave or whatever. A Helmholtz resonator of some kind may help in that case, and depending on the design they can still be fairly thin and not lower the ceiling too much. K
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Posted By: brokenjoe
Date Posted: 12 May 2017 at 6:07pm
It's mainly Hf / MF, just to deaden the room really, the bass end is ok i'd say 1000khz upwards ------------- error 404 |
kevinmcdonough wrote:Posted By: _djk_
Date Posted: 12 May 2017 at 9:00pm
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Flame-proof spray-on cellulose insulation does a good job. I heard the results in a large metal building, it made a large difference (even though it was done for heat-loss reasons, not sound). ------------- djk |
Posted By: ceharden
Date Posted: 13 May 2017 at 12:08am
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When I helped refit a music venue last year, I found some spare carpet tiles and glued them to the wall behind the mix position. They're not thick but I think it does make a noticeable difference. What is the ceiling currently?
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Posted By: brokenjoe
Date Posted: 16 May 2017 at 4:48pm
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the ceiling is typical warehouse ceiling / semi lowered / fibre boards sticking carpet tiles is gonna be pretty laborious, it 26m x 20m .. the roof also goes up to an apex at 2 points, so the ceiling area is bigger than that too ! i've seen some buildings with a bobbly textured ceiling, but no idea what the stuff is called.. looks like expanding foam, but not as expanded! ------------- error 404 |
Posted By: odc04r
Date Posted: 16 May 2017 at 5:04pm
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Spray on insulation stuff? |
Posted By: MPASOUND
Date Posted: 16 May 2017 at 5:51pm
That's what I was thinking. Something like this maybe? https://www.abbuildingproducts.co.uk/froth-pak-600--spray-foam-kit-pr-5015.php" rel="nofollow - https://www.abbuildingproducts.co.uk/froth-pak-600--spray-foam-kit-pr-5015.php ------------- It's just bits of paper flapping about in a box. |
Posted By: ceharden
Date Posted: 16 May 2017 at 7:22pm
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Are they standard loose tiles? If so, you can replace them with ones which have greater sound adsorption, they come in all kinds of different types. You could also do two layers of them potentially. Pictures would help. The other option is that you don't necessarily need to cover the whole area. If you made up some frames with serge or felt stretched across them and some fibreglass/polyester behind (bearing in mind fire regs), then hang them a few inches below the ceiling in various places that might help. Think Royal Albert Hall! |
Posted By: kedwardsleisure
Date Posted: 16 May 2017 at 7:31pm
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I've seen spray-on stuff used on a youtube video from a company erecting portable metal buildings, it's a sort of giant flock that insulates the building, looks like a cross between expanding foam and a feather pillow and is applied with a lance and mobile compressor. Whatever you use, make sure it isn't going to rain down toxic fireballs if there's a fire. H&S can get very sniffy about that sort of thing. ------------- Kevin North Staffordshire |
Posted By: kevinmcdonough
Date Posted: 16 May 2017 at 8:26pm
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hey Yeah I don't know if I'd go with spray on stuff, seems like a lot of hassle. I'd think that all the time cocooning the room in dust sheets and polythene, and then all the clean up of the over spray after, would be much more work that was actually worth it? If it's only general hf absorption you want, I'd just go with foam tiles. You don't need to go with super high quality, extra dense audio specific tiles, aim more for quantity than quality. Even just approach a foam manufacturer and try and buy in bulk straight from them rather than an audio or acoustic specific company. Long as it's open cell foam, and fire retardant/safe, then just buy a huge pile of it and no nails it to the roof, job done. No need for masses of cover up before or clean up after, like there would be with spray stuff. K
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Posted By: toastyghost
Date Posted: 16 May 2017 at 9:37pm
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We can supply panels that are organic, fireproof, and varying thicknesses with absorption data, they're very reasonably priced too even in black. I don't think they currently have any other UK distributor, it's an industrial focused company hence the lack of price gouging for studio people  Work incredibly well even in smaller amounts for 500Hz up. |
Posted By: fatfreddiescat
Date Posted: 16 May 2017 at 11:20pm
| Maybe look at acoustic rockwool insulation, relatively cheap and can be covered with cloth and screwed to the ceiling, |
Posted By: fatfreddiescat
Date Posted: 16 May 2017 at 11:21pm
| Or as toasty says. |
Posted By: Earplug
Date Posted: 17 May 2017 at 9:03am
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"We can supply panels that are organic," They´re edible?!? ------------- Earplugs Are For Wimps! |