How to make DIY acoustic panels

[Teti]

Simple guide with picture gallery how to make DIY acoustic panels

http://audiotweak.net/2013/03/16/how-to-make-diy-acoustic-panels/

 

[Teti]

Oh yeas and I have also made DIY printed acoustic panel in picture frame

http://audiotweak.net/2013/02/22/how-to-make-diy-printed-acoustic-panel-in-picture-frame/

 

[Teti]

I was told, that I should wrap the wool in some kind of foil to avoid tiny glass crystals spread in the room. Oh well... one picture and million opinions.

 

[alexh]

Google, Cara accoustic fabric.

They do the foam backed material that will trap the Rockwool fibres, It makes me cough when I have a Rollup ....

 

[Teti]

Thanks for a great tip. I doubt to any major upgrades to current panels, but surely will use in the future. At least I'll attach back side to standing ones. There is really no reason, why glass dust should be flying around the room isn't it?

 

[awkwardbydesign]

I was told, that I should wrap the wool in some kind of foil to avoid tiny glass crystals spread in the room. Oh well... one picture and million opinions.

I use pallet wrap, which is clingfilm on a handle. It is so thin that it will be acoustically transparent at audio frequencies, or if it attenuates at all it will be at very high frequencies. Which is fine, no?

 

[Pac67]

I use pallet wrap, which is clingfilm on a handle. It is so thin that it will be acoustically transparent at audio frequencies, or if it attenuates at all it will be at very high frequencies. Which is fine, no?

Errrm...no. It will be reflective to HF

 

[Pac67]

I was told, that I should wrap the wool in some kind of foil to avoid tiny glass crystals spread in the room. Oh well... one picture and million opinions.

Dont wrap it in anything reflective. If you can't blow through the material easily, it is reflective to sound.

Cara Acoustic material is one of the better options. I used their foam backed stuff to make a number of panels. For enhanced performance at lower mid frequencies you need to make the back acoustically transparent too (I used a polycotton treated with fire retardant) and leave a gap of a few inches to the wall by fitting spacers to the frame. Frequencies getting through the panel will be re-absorbed on their way back. the gap is critical and determines the wavelengh of the frequencies affected, but a couple of inches is fine.

 

[Interocitor98]

I used 18mm birch ply for the frames of my panels. Filled them with medium density rockwool panels. Some have acoustic foam in them, some have felt backs. The variation was to try and stop them all working at the same frequency range. Have never measured them so don't know, but they seem to do the trick.

 

[awkwardbydesign]

Errrm...no. It will be reflective to HF

I think it will only affect the very highest frequencies, and the fabric, (or other covering) will absorb those anyway. I'm only talking of single layer. I'll see if I can find some figures on that, to confirm or disprove.

 

[Interocitor98]

There's a very quick, rough and ready experiment that would give some indication if what happens with the clingfilm in place : wrap some round a speaker. If there's little difference its coupling the air each side and effectively acoustically transparent.

 

[Teti]

Datasheet to panels

http://mniec.files.wordpress.com/2013/03/acoustic-mineral-wool.pdf

 

[awkwardbydesign]

Datasheet to panelshttp://mniec.files.wordpress.com/2013/03/acoustic-mineral-wool.pdf

http://mniec.files.wordpress.com/2013/03/acoustic-mineral-wool.pdf

The graph shows very little absorption at bass frequencies. I suspect they have used a low density here, as 100mm of 145Kg/m3 should do better.

 

[Teti]

Yeah, it is 60gsm. I have 12 of them tho.

 

[johnniebaby]

The graph shows very little absorption at bass frequencies. I suspect they have used a low density here, as 100mm of 145Kg/m3 should do better.

That spec sheet looks as if it was produced in the middle half of last century.

 

[awkwardbydesign]

Probably, but I don't think rockwool has changed much.

Anyway, so was I!

Edit. I just thought, how do you get a MIDDLE half? Wouldn't that make 3 halves?

- - - Updated - - -

Yeah, it is 60gsm. I have 12 of them tho.

Still won't do much for bass, but if you don't need that, then OK.

 

[russ abbott - royds broth]

Have a pair of real traps to try,and need to get some rockwool for home made ones.

 

[awkwardbydesign]

Have a pair of real traps to try,and need to get some rockwool for home made ones.

http://www.wickes.co.uk/heavy-density-insulation-pk5/invt/161189/

 

[russ abbott - royds broth]

Bit expensive.