Trapping Traps

[kasmira]

Originally Posted by visa.the.dog

Kasmira I was interested to hear any results you had with the EnGuard. You mentioned earlier that the company was sending you some. Have you checked it out yet?

Unfortunately I never got an e-mail from the rep and I do not have his contact info (should have grabbed it while on the phone - didn't really think about it)

I will probably try to contact him in the next week if I don't hear from him. When it comes down to it - I could care less if I got it for free or not, a pack of insulation isn't dreadfully expensive, I just want to get it to get the ball rolling in my friend's room!

[MTB Vince]

Originally Posted by visa.the.dog

Vince, thanks for the reply. What are you DIY people in the US using for an absorbent material? That stuff is hard to find!

While I've not found a North American source for any sort of polyester wool clone of Isobond, I've found two places I can purchase BASF Basotect G from. Sticking with one of the two materials used in the original product development seems a safer approach than experimenting with pieces of open cell sponge products as Audiothings (successfully) did. Basotect G ain't cheap at $154 per 4'x8'x4" slab but then neither is the comparably priced hot rolled galvanized steel sheets in the 12 gauge to 20 gauge thicknesses we require. So I've decided to stick with one of the original Freunhoffer recipes.

Happy Trails!
MTB Vince

[DaVogi]

any news gernot?

[G. E.]

Originally Posted by DaVogi

any news gernot?

No news regarding testing. At the moment I use the room for storing various acoustic elements and for recording (anything from vocals to drums) because most of the original acoustic elements I had for testing went to customers in the meantime.

[DaVogi]

thanks for the reply!

[OpusOfTrolls]

Originally Posted by G. E.

No news regarding testing. At the moment I use the room for storing various acoustic elements and for recording (anything from vocals to drums) because most of the original acoustic elements I had for testing went to customers in the meantime.

I have to say that this is the most elaborate recording room design I have seen on GearSlutz thus far. Well done!

[Syncamorea]

Originally Posted by MTB Vince

While I've not found a North American source for any sort of polyester wool clone of Isobond, I've found two places I can purchase BASF Basotect G from.

I've been trying to retrace your steps since I'm also in the US and am ready to purchase. Along the way, I ran into this page:

BASF PlasticsPortal - Foams - Basotect

The photo is interesting... It looks like a porous metal surround and I'm assuming Basotect G is behind it. I'm making lots of assumptions but considering that this thread discussed putting devices on the ceiling, I thought I'd further muddy the waters.

So if you're still watching this, MTB Vince, please post the contact info for the US suppliers for BasoG.

And, but also... While searching melamine foam, I found this material... Melamine foam laminated to MLV. With a metal plate face, this would be worth a look:

http://www.acousticalsurfaces.com/fo...l_comp.htm?d=6

[jasman]

I've been following this thread and the related ones with keen interest, as I'm considering building my own plate absorber. This method appears quite potent.

Has anyone found a definite supplier for Basotect in the USA (or Canada)?

Thanks,
James

[OpusOfTrolls]

Originally Posted by jasman

I've been following this thread and the related ones with keen interest, as I'm considering building my own plate absorber. This method appears quite potent.

Has anyone found a definite supplier for Basotect in the USA (or Canada)?

Thanks,
James

Flat Faced Melamine Foam

Not sure if it is Basotect, but it should have the same characteristics. Compare the specs.

[G. E.]

Originally Posted by G. E.

No news regarding testing. At the moment I use the room for storing various acoustic elements and for recording (anything from vocals to drums) because most of the original acoustic elements I had for testing went to customers in the meantime.

UPDATE: I've put 18 CIB modules sized 60cm x 40cm x 10cm [~2' x 1'4" x 4"] aside for direct comparison with more common mineral/glas wool sheets, propably Knauf Ecose type.

[tasar]

Originally Posted by G. E.

UPDATE: I've put 18 CIB modules sized 60cm x 40cm x 10cm [~2' x 1'4" x 4"] aside for direct comparison with more common mineral/glas wool sheets, propably Knauf Ecose type.

GE.... forgive me if this seems redundant. Have you similar experience to Caruso when or if trying the Basotect G product in similar fashion ?

[G. E.]

Originally Posted by tasar

GE.... forgive me if this seems redundant. Have you similar experience to Caruso when or if trying the Basotect G product in similar fashion?

I haven't used any Basotect labeled product so far.

[tasar]

Thank you GE. Is the 1 X 1.5 m width/length relationship, critical ? That is, multiples of basically 40" X 60" as a benchmark ? I'm not sure this sizing was employed due to resonating properties, or merely a convenience based on available stock ?

[G. E.]

Originally Posted by tasar

Thank you GE. Is the 1 X 1.5 m width/length relationship, critical ? That is, multiples of basically 40" X 60" as a benchmark ? I'm not sure this sizing was employed due to resonating properties, or merely a convenience based on available stock ?

As I understand this type of absorbers the smaller dimension of the plate is related to the minimum size for a given design frequency (and its wavelength), the actual sizing we see "employs quite some convenience", and a single absorber won't save your day :-)

[blizt]

Originally Posted by G. E.

As I understand this type of absorbers the smaller dimension of the plate is related to the minimum size for a given design frequency (and its wavelength), the actual sizing we see "employs quite some convenience", and a single absorber won't save your day :-)

Hello G.E. I'm in the process of building some to get rid of the modes in my room. Can I ask you how many do you recommend to see a real improvement? I was thinking to build at least 2 panels 2mx1m. Thanks.

[G. E.]

Originally Posted by blizt

Hello G.E. I'm in the process of building some to get rid of the modes in my room. Can I ask you how many do you recommend to see a real improvement? I was thinking to build at least 2 panels 2mx1m. Thanks.

Thank you for your kind request but I'm sorry: I don't give this kind of advice on this forum.

[tasar]

It will be quite interesting to see results of the 18CIB panels. It may put to rest the notion bigger is better, as opposed to spreading absorption thruout the room. GE should be applauded for continued permutations. The velocity/pressure/location based nuances may become clearer. I suspect multiple strategic placement may mirror Tim Farrant's work with MLV over on another thread. The empirical is endless.

[DanDan]

+1 tasar, G.E.'s contributions are very welcome.
I have to differ on the mirror though. G.E.'s designs are tested and show very powerful behaviour.
DD

[tasar]

Looking further, I found cold roll steel is stocked in 5x12' sheets, so pretty apparent the testing made " best use", ie 3- 40" pcs 60" in length. Just too obvious. Does still beg the question, arr the width/length measures critical ? I have thought of cutting the sheet up differently. Standing a couple 2' x 7' panels in the corners would seem as logical as any other choice. I'm to try Basotech G, Enguard, and what I believe to be a Caruso equivalent here in the States. Please indicate any reservations you might have re random sizing. I appreciate all the input here at this forum.

[OpusOfTrolls]

I have successfully tested a 48" x 28" panel and it works well down to 40hz. I can't really say what effect the aspect ratio has, except it will change the modal distribution.

[G. E.]

Originally Posted by tasar

Looking further, I found cold roll steel is stocked in 5x12' sheets, so pretty apparent the testing made " best use", ie 3- 40" pcs 60" in length. Just too obvious. Does still beg the question, arr the width/length measures critical ? I have thought of cutting the sheet up differently. Standing a couple 2' x 7' panels in the corners would seem as logical as any other choice. I'm to try Basotech G, Enguard, and what I believe to be a Caruso equivalent here in the States. Please indicate any reservations you might have re random sizing. I appreciate all the input here at this forum.

In theory the plate dimensions make a difference in the modal distribution of the plate itself, as shown in Resonating.

[tasar]

Can any of the followers here provide me with a small Caruso sample ? Say a 4x4" block shipped Stateside ?

[tasar]

Anyone? Please let me know so that I can check a US manufacturers capability. This could be a benefit to Many

[tasar]

Originally Posted by G. E.

UPDATE: I've put 18 CIB modules sized 60cm x 40cm x 10cm [~2' x 1'4" x 4"] aside for direct comparison with more common mineral/glas wool sheets, propably Knauf Ecose type.

Gernot, was wondering if you had time to measure multiple sized modules as proposed above ?

[G. E.]

Originally Posted by tasar

Gernot, was wondering if you had time to measure multiple sized modules as proposed above ?

I've emptied the room recently (to do some measurements for clients) and the mentioned modules are still available but I don't want to "announce" specific tests (and dates).