John Sayers' Recording Studio Design Forum Archive

Hi Kaj,

Interesting idea. I've never personally had much luck with the hanger method. I've definitely never tried using MiniTraps as bass hangers. My suspicion is that it wouldn't work. The normal bass hanger design uses a rigid surface, with absorbent around each side. This is basically a gobo. The MiniTraps are velocity absorbers, which require sound to pass through it.

It'd be interesting to test this out, though....

John
Is it possible to use Styrofoam/Expanded Polystyrene/EPS or whatever you call it there instead of the homosote? I cant find something like that here.
Maybe Homosote is similar to OSB ?

If not. what else?

I reckon the close equivalent would be heavy packing cardboard, maybe two sheets glued together as homosote is made from recycled paper.

Cool
I'll get some heavy cardboard then...

Hi All,

I've placed my acoustic hangers and diffuser in the back. (See above.)
But when I'm on he mix position, I have (too)much sub low and when I listening in the back of the room there's none...zero...sub low.

Somebody any ideas why there is no sub low in the back of the room?
Too much trapping????

It appears you have a standing wave between the front and rear of the room. The diffusor won't have any effect on the low frequencies so it just bounces the lows back at you. Try removing it.

Thanks John.
That must be it, standing waves.
I'm going to measure the room Friday.

What's the best way to treat a standing wave?

John.
Hangers seem to not happening here.
I managed to purchase heavy cardboard but they are really small sheets. Even tho they are kinf of hard. they are nothing like homosote since they are "hollow" (a corrugated "S" sheet of carboard sandwiched by two rigid carboards, and x2). So Im guessing the density and resonance its not even close to a solid, pressed sheet of recycled paper like homosote.
Can you think of another replacement?
Or send me some homosote sheets to Chile

micmic wrote:
What's the best way to treat a standing wave?

In your case just had heavy absorption across the rear wall instead of the diffusor

jb - The product is Pinnacle - Tackboard.

http://www.pinnacleboard.com/

If you can't get that just use 1/4" OSB or similar.

What about CORK ???

yeah - good suggestion. When I started out in recording in the 60s cork was our version of 703. We'd line walls with it for acoustic treatment.

Ouchh..
A small sheet of cork ( 0.9 x 0.5 meters), at 1 cm thick.. is about $22 usd !!!
Cork here seems to be very expensive!! And we don't have large sheets like osb or drywall.. just those smal ones

Something doesnt want me to build hangers it seems . hee

forget about cork, really.

Ro wrote:forget about cork, really.

oh really Ro - why? apart from cost.