Hangging bass panells Hidley traps

Me too, and I do have this study, and this guy's reference list of the studied documents and literature is huge.

Sorry Eric. I am good but not quick. I know that you have access to privileged information, and I am NOT asking to divulge anything that is confidential. Is this study available to the public, and if it is who is the author and what is the title? Slowly, Andre

Andre, I entered it somewhere here in the forum with exact title, Author, Univ etc. And with a literally quote from the excerpt referring to the fact it called for more study and was still a paradox. It should be good that all significant/related links come together in one post. Otherwise I'll check the next days again for it here. I overlooked fast my shelves here, no luck yet (depressing). It's here within a 3 to 4 m radius from me, but that are wall covering book shelves from floor to ceiling. It's not published, but it's an end-work. Either via that Univ (UK) or Author it must be possible to get your hands on it.

[quote="Eric_Desart"that are wall covering book shelves from floor to ceiling. [/quote] Those B&W's of yours must sound terrific in such a room. But I don't envy you when you're dusting. :D

Well there is a new AES paper that make some intresting conclutions just out of the oven. Here is a scientific point of view more info go too AES web page and get the Papper Sound field characterisation and absorption measurement of wideband absorbers Soledad Torres-Guijarro1, Antonio Pena2, Alfonso Rodríguez-Molares2, and Norberto Degara-Quintela ABSTRACT Wideband absorbers are a fundamental part of non-environment control rooms. They consist of huge angled hanging panels in conjunction with a multilayer wall or ceiling. Their absorption capacity is very noticeable, mostly in the low frequency range. In this contribution, the mechanisms of absorption of the wideband absorbers of the rear wall of the control room at the Universidad de Vigo will be studied. Conclusions will be drawn from the analysis of pressure, velocity volume and intensity measurements performed in the vicinity of the panels, and from the computation of the normal specific acoustic impedance and the normal absorption coefficient. The Universiti of Vigo Lab was design by Philip Newell with Tom Hidly style traps making a nonenvariomental room Hope it is usefull for some of you

valentin wrote:

Well there is a new AES paper that make some intresting conclutions just out of the oven.

Thank you! Andre

hope it helps you it realy soves some speculation done before

Good studio building is 90% design and 10% construction

I'd disagree. BUILDING is 100% construction. Design is 100% design. 100% Good design results in 100% good construction. 10% construction makes good design moot. :roll:

I'd disagree. BUILDING is 100% construction. Design is 100% design. 100% Good design results in 100% good construction. 10% construction makes good design moot.

I think you missed the point. And tried to make a totally different point. And failed at that too. :shock:

Boys!

hey - at least - Gentlemen!

John did you check out the AES papper any thougts Valentin

cadesignr wrote:

Good studio building is 90% design and 10% construction

I'd disagree. BUILDING is 100% construction. Design is 100% design. 100% Good design results in 100% good construction. 10% construction makes good design moot. :roll:

As much as I agree that the numbers are not a fair representation of the design - construction tandem, to me, it has a missing piece and that is interpretation. Knowing how to design and knowing how to construct are two different things and trying to make both meet to a successful conclusion can be as difficult as either of the two. But I think Andre makes a good point because without design it is just a bunch of boards concrete nails and people standing around drinking coffee and soda pops waiting for the whistle to blow.

But I think Andre makes a good point because without design it is just a bunch of boards concrete nails and people standing around drinking coffee and soda pops waiting for the whistle to blow.

Well, you have your opinion. Heres mine. I've been a journeyman Architectural millworker who took the construction skills to the board/computer to build over 300 Macys .Over 15 years I saw hundreds of "designers" with their head up their ass, who, after submitting designs for bid, were subject to humiliation, not only on my board, but in the shop, and in the field. Your "without design" is a bunch of [vulgarity deleted by moderator]. Without the skilled craftsman it takes to FIX the [vulgarity deleted by moderator] that designers THINK they BUILD on paper/CAD/calculations/dreamland , you got NOTHING!!!!!

it is just a bunch of boards concrete nails and people standing around drinking coffee and soda pops waiting for the whistle to blow.

Surely you jest. Your view is obviously tainted by the contaminated water you are walking on. Perhaps my interpretation of Andres statement was also tainted. I've heard storys of and have been subjected to elititist architect/designer hyperenflated egos before, to the extent that their design no longer merited the trust of those who were the recipients of their repugnant class judgments, and justly so, recieved the same in return. Next time you inspect the paint on the top edge of a newly installed door, you would be wise to use the dental mirror in defense from those who just painted it. Your new $3k suit might be ruined.

It was a simple attempt at diffusion my friend. No need to get ugly:)

valentin wrote:

John did you check out the AES papper any thougts Valentin

No Valentin - I couldn't find it at AES.

cadesignr wrote:

But I think Andre makes a good point because without design it is just a bunch of boards concrete nails and people standing around drinking coffee and soda pops waiting for the whistle to blow.

Well, you have your opinion. Heres mine. I've been a journeyman Architectural millworker who took the construction skills to the board/computer to build over 300 Macys .Over 15 years I saw hundreds of "designers" with their head up their ass, who, after submitting designs for bid, were subject to humiliation, not only on my board, but in the shop, and in the field. Your "without design" is a bunch of crap. Without the skilled craftsman it takes to FIX the fucking bullshit that designers THINK they BUILD on paper/CAD/calculations/dreamland , you got NOTHING!!!!!

yeah yeah - the trademen blame the designers, the designers blame the tradesmen - nothing new. :roll:

in my view, what Andre means with the 90/10 rule; It takes 10% of the TIME to actually build and 90% of the TIME to get a (good) design. If the design is GOOD, and I agree with cadesignr on the bullshit that's out there, then your build would leave no questions asked. I'm spending many hours on design, including every little detail, so I know exactly what to do when holding the hammer. Cutting a sheet of MDF, for example, to exactly the measure your design tells you, does actually work (for me). I'm currently doing just that! @cadesignr, could you please refrain yourself from using such ugly words. Keep it cool, okay?! cheers.

John you have mail Its is a very new papper given in last mounth in Germany probably not yet in the e Libery Valentin

I got it - thank you Valentin - is it copyright or can I post it on the site?

it is copyright unfortunealy but you can shere it in your words or if some one kindly asks :wink: my ango is not that good

I'll share a couple of pics showing how they were built and hung.

The construction of the panels can be seen in Figure 2: the core is nominally a 19 mm chipboard panel, but somewhat thinner plywood is also sometimes used. Stapled to the board is a damping deadsheet of 3,5 kg/m2. Both sides of the panels are covered in 4 cm thick, cotton waste felt with a density of around 60 kg/m3.

I observed the Hidley panels close up and they were made using the homosote I've mentioned before and wrapped in pink insulation. (rigid fiberglass wasn't available in the 70s when Hidley started using them)

Stapled to the board is a damping deadsheet of 3,5 kg/m2.

Would something like heavy asphalt roofing paper work for that? MLV?

Never saw that with the Hidley panels Stuart. Don't know where they got that from. I still like to think of them as the oyster racks I've mentioned before, swinging in the ocean of waves going by and taking their energy. :)

YES I now that the homosote was the first use but in this papper it clerly says that the vibrational efect os the boards did not contibute significaly to the absortion of the system (less than 1%) this pannels basicaly change the sond direction and work as a lined duct