help with room studio (part 2)

dReAmfReAk · Post by **dReAmfReAk** » Sun Aug 14, 2005 6:16 am

I posted on the design forum for a design sketch and I've decided to go ahead with John's design which is the attached picture.

Right now, i want to focus on building the studio first. I have absolutely no idea on how to acoustically treat the room (where to place diffusers, slat resonators, etc). I want to use the studio for recording drums, acoustic guitar and vocals.....not simultaneously but to have the studio decent enough to be applicable to each situation.

Materials i intend to use for walls, floor and ceiling are plywood, rockwool, fibreglass, rubber pads/sheets.

Thanks.

*note* Floor-to-Ceiling Height = 2.35m

the dreamer · Post by **the dreamer** » Sun Aug 14, 2005 5:36 pm

The brown thing on top is a slat resonator!

Read all these to get a better idea:
http://www.saecollege.de/reference_material/index.html
http://forum.studiotips.com/viewforum.p ... 226b7354d0
http://www.johnlsayers.com/HR/index1.htm
www.bobgolds.com
http://www.johnlsayers.com/phpBB2/viewtopic.php?t=2125

As your room is pretty low I would go for several absorbing clouds on the ceiling, which also helps when rec. with overheads.

You could also build 2 gobos, which let you choose the prefered acoustics in future. There's a thread somewhere with a plan of gobos.

Florian

dReAmfReAk · Post by **dReAmfReAk** » Mon Aug 15, 2005 3:36 am

That's a lot to read lol! But i will get thru them all. Meanwhile......if those brown walls are slat resonators....then where are the bass traps? Or am i missing something here? lol

dReAmfReAk · Post by **dReAmfReAk** » Tue Aug 16, 2005 3:39 am

Haha

Ignore my previous post....i just read John's DIY wall units and i found my answer. Attached is the side wall diagram i slightly modified from John's webpage. I'll be using this diagram to construct the brown portion of the studio.

I have no problems with construction on the floors and ceilings. They are easy to plan out and i found the info i needed on them from John's webpages and alot of other threads.

Now all I'm left with is to find out how to go about doing the other inner walls in the studio to achieve my needs i mentioned in the 1st post.

*by the way, i plan to put the cloth over the slats instead of beneath them for aesthetic reasons. Will it affect?*

Thanks

dReAmfReAk · Post by **dReAmfReAk** » Fri Aug 19, 2005 3:01 am

dReAmfReAk wrote: Now all I'm left with is to find out how to go about doing the other inner walls in the studio to achieve my needs i mentioned in the 1st post.

*by the way, i plan to put the cloth over the slats instead of beneath them for aesthetic reasons. Will it affect?*

Thanks

No replies to that?

Anyway what you guys think of this? im intending to use them for acoustic treatment in my room studio.

http://www.sm.com.sg/ProAudioSeries/ProAudioSeries1.htm

and

http://www.sm.com.sg/ProAudioSeries/ProAudioSeries2.htm

knightfly · Post by **knightfly** » Tue Aug 23, 2005 6:16 am

Sorry for the delay, time always goes away faster than my need for it; check out my re-draw of the slat absorber plan here

http://www.johnlsayers.com/phpBB2/viewtopic.php?p=23691

Notice my comments about the cloth in the sketch posted on Mar 11 - the text on the sketch itself.

You could also put cloth in FRONT of the slats, won't hurt anything; but you need the cloth and insulation up against the slots both for damping (no ringing of slats) and for acoustic resistance (a helmholtz is just an acoustic version of an electronic filter, so ALL elements need to be in place for predictability)

HTH... Steve

dReAmfReAk · Post by **dReAmfReAk** » Sat Oct 01, 2005 12:56 am

Been reading a couple of more threads and webpages etc... Needed to clarify a few things.

Am I right to say that the slot resonator in my live room has to be tuned to 300Hz since Im gonna record drums in there?

If so, what will be the most preferable depth between the original wall and the slot resonator wall so as to make it effective?

Lastly, according to the design, I only have to build one slot resonator while the rest of the walls in the live room can be basic absorbers (cloth but not backed)?

I'm a little embarrassed to confess this but FINALLY i've realised the difference of building a room for sound isolation and buidling a room for acoustic purposes lol

knightfly · Post by **knightfly** » Sun Oct 02, 2005 6:21 am

Am I right to say that the slot resonator in my live room has to be tuned to 300Hz since Im gonna record drums in there?

Right.

If so, what will be the most preferable depth between the original wall and the slot resonator wall so as to make it effective?

With a variable depth resonator like that, you'd use half the maximum depth as the value to enter in the helmholtz calculator - the varying depth will somewhat broaden the traps's response so it's not too "peaky". So, for example, if your total trap depth behind the slats is 300mm, you'd use 150mm as your depth - if you then used 19mm x 135mm slats (1x6 in U.S.) spaced 15mm apart, you'd end up with a center frequency of around 297 hZ.

Lastly, according to the design, I only have to build one slot resonator while the rest of the walls in the live room can be basic absorbers (cloth but not backed)?

Your call; personally, I'd build the other absorbers in such a way that slats could be added after the fact; then I'd MEASURE and LISTEN and RECORD in the room before deciding whether to add slats and cloth or not.

I'm a little embarrassed to confess this but FINALLY i've realised the difference of building a room for sound isolation and buidling a room for acoustic purposes lol

Yeah, the two are almost mutually exclusive; except of course, for the NEGATIVE effects most acoustic treatments have on Transmission Loss

... Steve