Wall finish? Total interior absorption amount?

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jsdpark
Posts: 2
Joined: Mon Aug 16, 2021 9:02 pm
Location: Sydney, Australia

Wall finish? Total interior absorption amount?

Post by jsdpark »

Hi all,

Studio build in Sydney, Australia here. (5.5m/4m/2.45m H) double control room & live room

Quick question regarding control room interior wall "finish";

Should most of the walls be covered in absorption? I read in Rod's book that 20-25% of the total interior surface area acting as absorption is a good amount - does this mean including floors and ceilings, only 20-25% of the interior should be absorptive, and the rest reflective?

I see in many studio control rooms have these kind of panels up (see the red/black panels); are these absorption panels (fibreglass wrapped in acoustic cloth)?

https://static.wixstatic.com/media/417e ... 0_s_2.webp

https://static.wixstatic.com/media/417e ... 0_s_2.webp

https://static.wixstatic.com/media/417e ... 0_s_2.webp

Many thanks! I really can't find a specific answer to my question, I've searched around the forum & online
DanDan
Senior Member
Posts: 637
Joined: Tue Mar 25, 2008 3:31 am
Location: Cork Ireland
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Re: Wall finish? Total interior absorption amount?

Post by DanDan »

Hiya. Without looking it up, I would guess that Rod means 25% visible surface area absorbent. Much of his, and John here, and others' work consists of deep fibre traps with a layer of reflective laths with gaps fronting. So at low LF the whole surface would be pretty absorbent.
I cannot view those links. Prosumer studios often use commercial or DIY traps based on the available absorption material. i.e. Semi rigid fibre batts of say 50-100KG, wrapped for obvious reasons. A friend came up with a very neat design. Electrical Tray, Knauf Ecose batts, Bedsheets. You need a little angle grinder to nick triangles out of the tray to get this neat finish and easy build.
Best DIY Trap Ever smaller JPG.JPG
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