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DIY Acoustic Panels

Highef

New Member
Hi,
I would like to give this small contribution of my DIY acoustic panels build process.
They are very efficient, compact, looks very nice, good finish and extremely lightweight. You can do in any color combination you want.
I will post here the process for a 60x60cm 2" (5 cm) thick. But any other size the process is the same.

Absorber material: I use rockwool rigid panel, density 80, 60x60cm and 2" thick. They are very good for first reflection points. For corner basstraps, a minimum of 4" must be used. I bought them in 120x60 cm in my local market and use a bread knife to split them off easily. Rigid fiberglass can be also used. Avoid using foams.
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Framing: Aluminum corners used for protecting walls corners. There are a variety of sizes, colors and finishes. I choose a brushed dark brown.
Since the panels have 60x60cm/2" I used a small saw to cut the pieces. 8 pieces with 60cm and 4 with 5cm (2").
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Use puncture tools to prepare the point where you want to make the holes.
We are going to use rivets to join the parts, so make sure the hole has the same rivet diameter.
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A riveter provides a very tight, yet adjustable, joint.
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Make sure the first framing set is square. You can still adjust if needed.
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Put the 2" framing and prepare the second part of the framing. Of course, don't join them yet.
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Do a pre-fit to make sure everything is ok.
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The fabric: Choose a soft and breathable fabric in the desired color. Be careful when choosing the fabric because it must not interfere in the absorption. Should be acoustically "transparent".
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I used a very efficient softness tool to make sure it is suitable.
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Cover the rockwool piece as shown, leaving enough fabric to close the sides.
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Pull slightly the fabric and cut along the corner as shown. Don't worry about the finish because it will be hidden by the aluminum frame.
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Using a glue gun, apply a row of glue, pull the fabric that come from the bottom and glue it. You should always pull the fabric stretching it to avoid wrinkles.
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Cut the remaining material as close as possible to the glue. Again, don't worry about the finish since it will be hidden. The bottom line is to pack the rockwool with fabric being careful to make the joints in the corners so it can be properly hidden by the framing.
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Fit the pack and rivet the final piece. You can use an old credit card to adjust the fabric that can wrinkle by stretching it to the corners.
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Here it is. A perfectly squared and nice finished acoustic panel. You can use furniture tri-corner protector to add additional finishing and hide the rivets.
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The final result is a very clean visual and a very good result for the sound.
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I hope you enjoy it.

thanks
HF
 
Nifty. thanks for posting this. Working on my room acoustics is going to be my next project. What's the total cost for two panels? Are the bass traps framed? It doesn't look like it from the photos. How did you mount the panels and bass traps?
 
Very nice work.

Have you done any actual measurements?

What is your impression of the change in the acoustics of your room?
 
Wow, this is great! Thank you for the detailed instructions and the great pictures - they're very helpful.

I really like your softness tool, too! :thmbsp:
 
I bought a large heap of foam acoustic panel years ago with thoughts of making panels of some sort. This stuff is gray rubbery foam that was made to absorb sound inside of boxes containing noisy printers. Has a hard back with adhesive backing. Stuff really works but is just ugly. Well it was only about a buck for each large sheet. Thick too. At least you got me thinking again.
 
The cost of each squared panel here where I live would be something around US$ 80,00 or less. But this is an estimation using the costs I have in my country. I'm quite sure in USA you can made them cheaper.
The big vertical panels are not framed, indeed. I just mount them using wall supports and covered with fabric. You can see in the pic below that I put 2 more framed bass traps at the ceiling.
I chose rockwool because it's easier to find in my local market. Fiberglass is also suitable.
There are huge benefits on adding corner traps (mandatory for small rooms):
- The reverb time of the low frequencies decreases. It means that the bass will be drier, more precise. I always say that the bass gains resolution.
- You kill stationary waves
- The mids and high gets much better! Just because the excess of bass was tamed, allowing them to show off their clarity.

BTW, Ethan Winer is one of my Acoustic Gurus.

best regards
HF


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HF, this is valuable info, thanks. I'm still not clear on how you mount those bass traps, though. What kind of wall supports? Do you have a picture?
 
Wilberforce, These panels don't appear to be very heavy, I imagine one could suspend them like a picture frame.
 
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