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Studio traps

Robert

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Yes i had no idea what they were either.

Our close friends son is a music producer and recently moved to a house with a garden room. he wants that as a home studio. To that end sorting out the acoustics is important apparently.

He got a quote for pre made 'traps' and it was eye watering. He read about making your own but he is not practical at all. that is where I come in.

This was the first picture he sent me to show what it was all about

traps-1.jpg


That is a less than ideal setup but showed what traps were - sound absorbent large tubes.

I had no intention of making a thread on this so the pictures are mostly whats app images taken for private messages. It's quiet here on projects so I thought I'd post anyway.

Pipe insulation was ordered. They are all 1200mm long when they are delivered. To try it out 5 of the large diameter with 50mm thick insulation. About 380mm outside dia. they are ordered on inside sizes as they are for pipes.
traps-2.jpg


Seemed fine so 15 more smaller 25mm thick ones ordered. he does have a proper chair btw.
traps-3.jpg


There is no picture of the end cap design i came up with but you can see them in the background here. 12mm MDF circle glued to 18mm spacer block of MDF hot glued to a 25mm polystyrene circle. The poly pushes into the tube and keeps the end central. it also traps the material covering.
traps-4.jpg


The large ones are done as double tubes. They are speaker stands. The lower part is cut to height to locate the speaker at ear level. Above the speaker is a shorter infil unit. I had a lot of wire rope and held it into a hole with a countersunk screw. When the wire is pulled and a screw fitted on top the ends are pulled together and all is secure.
traps-5.jpg


Sneaky shot was taken of yours truly during the outdoor assembly process. nasty stuff glass fibre. You can also see another feature - half the outer foil had to be peeled off to give an absorbent and a reflective side for different applications. It was a 3 man job but I'll leave friend and son out of this.
traps-6.jpg


The covering is stockinette cleaning cloth. It comes on a roll, is tubular, stretchy and is the colour he wanted. The uneven surface of the exposed glass fibre shows through a bit but it seems to function well. 2 layers on everything.
traps-7.jpg


traps-8.jpg


The story so far
traps-9.jpg


Cost so far is about 1/20th of the quote he got. He loves how it works so far and couldn't be more pleased.

Still to do is stands to lift all the smaller tubes to the same height as the speaker units. That has to fit in with his work schedule so not started yet.

There will also be flat absorbent panels hung on back walls. The curtain eyes in that last picture were my way of avoiding a domino disaster where they all fall over. a soft string threaded through so if you knock one it won't go over unless you hit so hard they all move.
 
That’s most impressive, things have come on a little bit since we used to glue 12 in square egg trays to the wall, lol, is he not concerned about the sound bouncing back from the wall behind him? Ian edit reread and dealt with the reverb.
 
Behind will be the flat panels.

Him and his business partner have an established studio so he is experienced in how the room should react to sound. I'm not going to name drop who they have produced but they are well regarded and know what they are doing. From what he has said completely absorbent is not what he needs. there has so be some reflection too.
 
Brilliant. Great thread.

I used to have a private little rehearsal studio years ago, brick built (planning was originally for a 3 bay garage, plastered on the inside. Two bays had glazed bifolds, which has strip blinds in front. Hard to damp. The walls were damped with thick flooring rugs hung from plate level. It worked reasonably well. Your solution here looks a great deal more professional.

Would be very interesting to hear some before and after sound tests. Some set ups sound over damped and dead, where all reverb is killed. Your solution here gives lots of flexibility.
 
Much more professional than the egg trays we lined our little sound studio with when I was school, I left in 71.
I used egg trays again in the late 80's when I was teaching at college. They built a new engineering block, to save money they didn't fit a suspended ceiling like the original one. The under side of the roof slab was just painted white, in the room I used for most of my classes there where two RSJ type beams that ran the length of it. The room had no soft surface so the sound just bounced round and round. After a year of students complaining about the noise, I collected loads of egg trays and me and a technician spent two days glueing them to the beams.
I got into trouble with the principal as he thought it was an eyesore! But had to fight of other members of staff after they found out how much better the room was to teach in.
When the block was remodeled all of the rooms had sound dampening added.
 
Well, if you weren't already on my informal list of useful contacts, you certainly are now. :) What a lovely generous gesture. I hope he appreciates you and your work!
 
these are helmholtz resonators from what I am seeing, they don't look too difficult to make, I take it you measured the room first? his room reminds me of bruce swedien who mixed micheal jackson and george benson. I'd like to know more about them, what frequencies are the effective at? this type of bass trap is supposed to be really effective in the low end, I'd love to hear what that room sounds like being into audio engineering myself, great job, they look really professional.
 
I had to google that resonator and these are certainly not those. These are filled loosely with Rockwool. I'm told the fill does something for the higher frequencies. There is nothing to resonate.

I helped him turn an idea into a product but take no credit for the audio performance.

I'm sure I'll get a proper demo once it is all finished. he has tested it quite a lot and thinks it is great. I snapped my fingers in the empty room and listened to the echo then did it again with the tubes in and it was very different with almost no echo.
 
AndyT":bx14qkml said:
What a lovely generous gesture. I hope he appreciates you and your work!

And that's where things get awkward. I didn't do it for reward. It was for a friends son that is so close they are extended family. But the question will come - what do I owe you or what can I buy you? I don't want anything but may be forced to come up with something he can buy. He can afford it but I don't really want it!
 
Robert":2u3go712 said:
AndyT":2u3go712 said:
What a lovely generous gesture. I hope he appreciates you and your work!

And that's where things get awkward. I didn't do it for reward. It was for a friends son that is so close they are extended family. But the question will come - what do I owe you or what can I buy you? I don't want anything but may be forced to come up with something he can buy. He can afford it but I don't really want it!

Donation to a charity perhaps ?
 
Cabinetman":2400o6bm said:
Thought the muslin was an inspired idea btw.
Bottle of Scotch? He will want "you" to have something.

Good idea, bottle of Scotch, send it to me, that way he gets to buy 'you' a reward, you get what you want (nothing) and I get a bottle of Scotch. Everyone's a winner!

:eusa-whistle:
 
Robert":282ovde5 said:
I had to google that resonator and these are certainly not those. These are filled loosely with Rockwool. I'm told the fill does something for the higher frequencies. There is nothing to resonate.

I helped him turn an idea into a product but take no credit for the audio performance.

I'm sure I'll get a proper demo once it is all finished. he has tested it quite a lot and thinks it is great. I snapped my fingers in the empty room and listened to the echo then did it again with the tubes in and it was very different with almost no echo.

I presumed they were based on tubetraps which are helmholtz resonators, yours sound more like broadband bass traps but I am sure they will work well.
 
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