svenr Posted June 13, 2014 Posted June 13, 2014 (edited) How do you turn a concrete shoebox into a project recording studio - with no money for acoustic treatments? This is the room - concrete floor and ceiling, brick rear wall, and noise insulating sidewalls made from Durapanels? The sound of the untreated room is very bad - pronounced slap echoes in all directions, long reverberation time of about 1.5 sec, poor speech intelligibility across the room. Here are a couple of examples how to DIY cheap room treatments. (I will update this as I take more pictures). Sidewall diffuser panels For the two sidewall we designed a total of 12 identical 1D BAD diffusor panels. They are roughly 1.2m by 0.6m large and made from 12mm MDF with pine corner posts to stabilise the thin MDF frames and allow for safe fastening. Note how the corner posts protrude from the rear. The diffusionproperties are achieved by a Maximum Length Sequence (MLS) facing made from 39mm wide and 3mm thick MDF strips. The absorbing material with which the frames will be filled is 90mm thick polyester fibre material rated at R2.5 (and thus has a suitable flow resistivity). Once the absorbing material is mounted, the entire frame will be wrapped with a thin fabric to give a nice surface finish. The front of the diffuser frames sits 200 mm in front of the walls to increase the absorption at lower frequencies as much as possible - thus the protruding corner posts. The material costs are very small as MDF, pine boards and polyester insulation batts can be purchased very cheaply. The real cost is in the blood, sweat and tears shed while cutting all the wood and mounting the frames and facings All 12 sidewall diffusers ready for mounting the absorbing materials: A closeup of the facing forming the 1D BAD MLS sequence. If anybody is interested in the physics behind it - Jamie Angus' AES papers on the subject are worth reading. Edited June 13, 2014 by svenr 1
Midori Posted June 13, 2014 Posted June 13, 2014 Are they meant to be mounted horizontal or vertical?
frankn Posted June 13, 2014 Posted June 13, 2014 Size of room? Are you placing these floor to ceiling on each wall. As others this will be interesting to follow Sent from my iPhone using Tapatalk
frankn Posted July 10, 2014 Posted July 10, 2014 @ "sven" has this project progressed? Any additional pictures you care to share or replies to comments/questions Regards
almikel Posted August 22, 2015 Posted August 22, 2015 Couldn't help revisiting this thread based on my recent interest in BAD panels and their design criteria. Took me ages to find this thread again, since I was searching for Svenr's content and it didn't show as this thread is older than 12 months :lol: . I'll have to stop being a cheapskate and pay for the Angus paper on BAD panels... @@svenr, would love to see an update on this great project The 39mm width MDF you mention - Where the MLS sequence has multiple 1's in a row it looks like you cut the MDF for the total width? For mounting multiple periods of 1D QRDs often 1 panel in a series is rotated 90 degrees to reduce lobing from the periodicity - is that the same for BAD panels? How has the room turned out? cheers Mike
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