[LAU] DIY acoustic absorbers?

[Johan Herland]

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On Sun, May 25, 2014 at 1:47 PM, Gabriel Nordeborn <gabbe.nord at gmail.com> wrote:
> So, my question is about DIY acoustic absorbers. I'm most likely looking to
> build absorbers both for mid/hi-end (I'm thinking the classical rock wool
> ones you place spaced out a bit form the walls) and for the lower end, but I
> am very much open for suggestions. Here's some specs of my setup:

I built some DIY floating panels suspended from the ceiling of my
living room (to improve the acoustic environment in the TV/music/couch
area). That part of the room is about 3.60m wide, 4.60m long and 2.60m
high, so the dimensions are not too far off from yours. Maybe you'll
find some of this useful/inspirational:

I ended up building two big panels. each 3.00m x 1.20m. Each big panel
is made from 5 smaller Troldtekt (http://www.troldtekt.com/) 1.2x0.6m
acoustic panels. I went for the "Troldtekt Plus 75mm" variety, which
consists of a 35mm thick layer of "wood wool" backed by a 40mm layer
of mineral wool.

The big panels are suspended ~0.25m from the (concrete) ceiling, by
screw-in hooks and metal wires. Leaving some room behind the panels
(as opposed to mounting them flush against the ceiling) improves
absorption towards lower frequencies, and I still have ample height
(~2.30m) below the panels. Also: suspending with wires means that I
have the option of (re)moving the panels, leaving only 2 x 4 small
holes to be spackled+painted.

Some old, crappy pics from my phone here:
https://www.dropbox.com/sh/xt2r8idaiqvhlld/AAD41vpxFRbDif_88uWk62Uva#/

Your usage (home studio as opposed to living room) means you'll likely
need much more acoustic treatment than me.However, tackling the
ceiling first, allows you to improve things a lot without giving up
any "horizontal" space...

...Johan

-- 
Johan Herland, <jherland at gmail.com>
www.herland.net