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Vertical ceiling foam panels in a school canteen (cafeteria?). How they work?

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xaviescacs

xaviescacs

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"Rationalism is no longer in vogue"... ding... ding... ding... we have a winner for the most understated observation since someone said that Savonarola had a little BBQ... vanitas... vanitas... omne vanitas. (Sorry... been binging on Durant's Volume VII)

:D
 

Katji

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Gaudi, yes. Video of Night Experience [AV] coming up in "What are we listening to" thread, i just got digressed a bit when I went there... ....ag, what the hell...

 
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xaviescacs

xaviescacs

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Gaudi, yes. Video of Night Experience [AV] coming up in "What are we listening to" thread, i just got digressed a bit when I went there... ....ag, what the hell...

That's what Gaudi would have called a nightmare.... to see his houses, intended for people, used as a bait/lure for tourists to consume gin and tonics for 18 €. This places are about daylight, quietness, a lack of harshness, both visual and acoustical... it's a place to live, to talk with your neighbors... but as you can see, the owners of the building, banks, have reinterpreted history and culture to build an idiosyncrasy of the city that's completely artificial and only intended to make more and more people consume their overpriced drinks.
 
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xaviescacs

xaviescacs

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I installed a few of these. In fact the Restaurant I had my first job in had these wooden slats so it would make the Air cleaners quieter back in the day when we had smoking sections in restaurants. So you saw them a lot more often in the past being installed then today.

There was a formula from what I understand that works on the same principle as calculating port length or box tuning. It would target those frequencies, and in some cases provide acoustic cancelation of a target frequency range.

You notice them more often in older builds since they use to take into account the way a space sounded as well.
This goes back to the days where an architect would take into account all aspects of the structures design and it was deemed a very important part. Something that goes to the wayside these days as costs for doing this often are axed due to cost overruns.

Firms such as SSA acoustics specialize in materials such as metal panels being tuned in order to be used as sound absorption facades. This is sort of the reason why its not so popular these days since it does take quite a bit of money and time to get all of this up and running and us usually left for Big funded construction such as civic projects that don't bother with cost as these building projects tend to be permanent lasting buildings that often won't see any further updates after final construction.
View attachment 207939

The slats from what I understand are tuned Monochords.
The slats (Tuned metal in this instance) is made to a length, size or shape to give it a desired tuning. This tuneing can either act as a sound absorber, (attenuation) or amplification (reinforcement of frequencies) .
--------Hence why you will see ones made out out of wood with shapes trimmed into them to get them to resonate as a certain frequency desired. Therefore, they either amplify or cancel out room acoustics or tune them in such a way for either speech, music etc. Ala, Symphony Hall is a 2,262 seat concert venue in Birmingham, England.

SymphonyHallPanorama.jpg





Architectural acoustics​


A book from 1932:
Page 419 goes over school buildings in detial.
View attachment 207936

It was also used for outdoor applications such as Art installations and Exhibits.
Here is Pioneer Courthouse Square that has this really cool space where everything sounds like you're echoing back to yourself. More like Binaural sound but without headphones. You have to have 2 working ears to hear this.
pioneer-courthouse-square-art-echo-chamber.jpg



photo-1.jpg


pioneer-courthouse-square-031.jpg





Some cool people who were the pioneers of this stuff as far as I can find and read up on in the past.

View attachment 207943Frederick Russell (Russ) Johnson
View attachment 207944





The O.G. Greek Accoustian. 570 – c. 495 BC
220px-Pythagoras_in_the_Roman_Forum%2C_Colosseum.jpg
Pythagoras of Samos

In the 6th century BC, the ancient Greek philosopher Pythagoras wanted to know why some combinations of musical sounds seemed more beautiful than others, and he found answers in terms of numerical ratios representing the harmonic overtone series on a string. He is reputed to have observed that when the lengths of vibrating strings are expressible as ratios of integers (e.g. 2 to 3, 3 to 4), the tones produced will be harmonious, and the smaller the integers the more harmonious the sounds. For example, a string of a certain length would sound particularly harmonious with a string of twice the length (other factors being equal). In modern parlance, if a string sounds the note C when plucked, a string twice as long will sound a C an octave lower. In one system of musical tuning, the tones in between are then given by 16:9 for D, 8:5 for E, 3:2 for F, 4:3 for G, 6:5 for A, and 16:15 for B, in ascending order.[6]



Honorable Mention:
250px-Jean_Nouvel_2009_Vienna_frontal.jpg
Jean Nouvel, French architect.

Jean Nouvel​





Archaeoacoustics

Truly fascinating reading on how this sort of field evolved over the years. I sometimes wonder why on earth they don't have people from colleges go into schools for and teach this fundamental of sound to kids. If they did? I bet you music today would be a lot more interesting. And so the same with architecture.




There are more sheep farmers in the world then there are acousticians. Sadly...
.
You don't get these spaces to often as our culture has delved into a throw away Society.
instead of improving the Acoustics we simply use speakers to mask the environment around us instead of improving it. Active noise cancelation being the new fad as its cheaper to install tech then do the proper job of improving the space above.

There are also real world limitations on what you can actually do as far as architecture that will work in the acoustic environment / space. The first being finding anyone that is able to pull it off. You also have to take into account building codes. If the building is in an area that has earthquakes for example? It would be hard to pull something like this off to code.

Example:
-Section R102 Modifications to ASTM C 635 — Standard Specification for the Manufacture, Performance, and Testing of Metal Suspension Systems for Acoustical Tile and Lay-In Panel Ceilings

-Support and Bracing Requirements for Ceiling Suspension Systems with Lay-in Panels

-PRESCRIPTIVE STANDARDS FOR SUSPENDED CEILING ASSEMBLIES

-Grid Ceiling Construction Guidance Suspended Acoustical Grid Ceilings 2009 International Building Code




Why did it become such a thing to do in buildings? Well. Its due the 19th century thought that items that suronded people have a way of absoribing their "Soul" voice or aura. This was popularized by a few people back in the day. One notable person that I could find is, Charles Sanders Peirce who wrote back in 1902:

"Give science only a hundred more centuries of increase in geometrical progression,
and she may be expected to find that the sound waves of Aristotle's voice have somehow recorded themselves"






OTHER Sources:

https://asa.scitation.org/journal/jas


++++++++++++++++++++++++++++++++++++++++
++++++++++++++++++++++++++++++++++++++++​


The Journal of theoretical and computational acoustics


++++++++++++++++++++++++++++++++++++++++
++++++++++++++++++++++++++++++++++++++++​



X0022460X.jpg
Journal of Sound and Vibration

++++++++++++++++++++++++++++++++++++++++
++++++++++++++++++++++++++++++++++++++++​

Applied Acoustics is a leading international journal that reports original scientific research in acoustics with broad impact in engineering applications
I'm glad my thread encouraged you to post all this. Thanks. :)

I have the impression that we are sacrificing a lot in the name of safety and regulations, and I would guess that many times is due to fear of promoters and politicians to face legal consequences if something bad happens, but many people may would accept some risk in exchange for living in a more "human" space, rather than a square cubiculum. I guess cost and time are major factors too, but as you have quoted, there are many places with good designs in that respect without, apparently, costing a fortune, so there is sometimes just a lack of will to do things properly, and just get the job done and go home. Here in my town there are a couple of architect's offices that do really nice jobs, specially when rehabilitating old houses. The rest just straight lines, glass and SS, and that's it. Just my uninformed random thoughts...
 
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xaviescacs

xaviescacs

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I was thinking Gaudi nightmare.
If you mean you don't like it, you're not alone... it's a bit ambivalent sometimes... don't know if you like it or want to shot it just in case...

For a couple of years I lived next to Parc Güell, when it was free, in front of Arnold Schoenberg's house!, and really enjoyed the place for having a walk or mainly to read a book, but it's not a building, so "natural" forms integrate much better with nature itself, as a part of it.
 
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lincolnalmiron

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I installed a few of these. In fact the Restaurant I had my first job in had these wooden slats so it would make the Air cleaners quieter back in the day when we had smoking sections in restaurants. So you saw them a lot more often in the past being installed then today.

There was a formula from what I understand that works on the same principle as calculating port length or box tuning. It would target those frequencies, and in some cases provide acoustic cancelation of a target frequency range.

You notice them more often in older builds since they use to take into account the way a space sounded as well.
This goes back to the days where an architect would take into account all aspects of the structures design and it was deemed a very important part. Something that goes to the wayside these days as costs for doing this often are axed due to cost overruns.

Firms such as SSA acoustics specialize in materials such as metal panels being tuned in order to be used as sound absorption facades. This is sort of the reason why its not so popular these days since it does take quite a bit of money and time to get all of this up and running and us usually left for Big funded construction such as civic projects that don't bother with cost as these building projects tend to be permanent lasting buildings that often won't see any further updates after final construction.
View attachment 207939

The slats from what I understand are tuned Monochords.
The slats (Tuned metal in this instance) is made to a length, size or shape to give it a desired tuning. This tuneing can either act as a sound absorber, (attenuation) or amplification (reinforcement of frequencies) .
--------Hence why you will see ones made out out of wood with shapes trimmed into them to get them to resonate as a certain frequency desired. Therefore, they either amplify or cancel out room acoustics or tune them in such a way for either speech, music etc. Ala, Symphony Hall is a 2,262 seat concert venue in Birmingham, England.

SymphonyHallPanorama.jpg





Architectural acoustics​


A book from 1932:
Page 419 goes over school buildings in detial.
View attachment 207936

It was also used for outdoor applications such as Art installations and Exhibits.
Here is Pioneer Courthouse Square that has this really cool space where everything sounds like you're echoing back to yourself. More like Binaural sound but without headphones. You have to have 2 working ears to hear this.
pioneer-courthouse-square-art-echo-chamber.jpg



photo-1.jpg


pioneer-courthouse-square-031.jpg





Some cool people who were the pioneers of this stuff as far as I can find and read up on in the past.

View attachment 207943Frederick Russell (Russ) Johnson
View attachment 207944





The O.G. Greek Accoustian. 570 – c. 495 BC
220px-Pythagoras_in_the_Roman_Forum%2C_Colosseum.jpg
Pythagoras of Samos

In the 6th century BC, the ancient Greek philosopher Pythagoras wanted to know why some combinations of musical sounds seemed more beautiful than others, and he found answers in terms of numerical ratios representing the harmonic overtone series on a string. He is reputed to have observed that when the lengths of vibrating strings are expressible as ratios of integers (e.g. 2 to 3, 3 to 4), the tones produced will be harmonious, and the smaller the integers the more harmonious the sounds. For example, a string of a certain length would sound particularly harmonious with a string of twice the length (other factors being equal). In modern parlance, if a string sounds the note C when plucked, a string twice as long will sound a C an octave lower. In one system of musical tuning, the tones in between are then given by 16:9 for D, 8:5 for E, 3:2 for F, 4:3 for G, 6:5 for A, and 16:15 for B, in ascending order.[6]



Honorable Mention:
250px-Jean_Nouvel_2009_Vienna_frontal.jpg
Jean Nouvel, French architect.

Jean Nouvel​





Archaeoacoustics

Truly fascinating reading on how this sort of field evolved over the years. I sometimes wonder why on earth they don't have people from colleges go into schools for and teach this fundamental of sound to kids. If they did? I bet you music today would be a lot more interesting. And so the same with architecture.




There are more sheep farmers in the world then there are acousticians. Sadly...
.
You don't get these spaces to often as our culture has delved into a throw away Society.
instead of improving the Acoustics we simply use speakers to mask the environment around us instead of improving it. Besides all this I can't help noticing that visite site the declaration of independence is a very important day for all of us, because on this day we became freer in its rights, this is very nice, because now I can build absolutely anything I like. Active noise cancelation being the new fad as its cheaper to install tech then do the proper job of improving the space above.

There are also real world limitations on what you can actually do as far as architecture that will work in the acoustic environment / space. The first being finding anyone that is able to pull it off. You also have to take into account building codes. If the building is in an area that has earthquakes for example? It would be hard to pull something like this off to code.

Example:
-Section R102 Modifications to ASTM C 635 — Standard Specification for the Manufacture, Performance, and Testing of Metal Suspension Systems for Acoustical Tile and Lay-In Panel Ceilings

-Support and Bracing Requirements for Ceiling Suspension Systems with Lay-in Panels

-PRESCRIPTIVE STANDARDS FOR SUSPENDED CEILING ASSEMBLIES

-Grid Ceiling Construction Guidance Suspended Acoustical Grid Ceilings 2009 International Building Code




Why did it become such a thing to do in buildings? Well. Its due the 19th century thought that items that suronded people have a way of absoribing their "Soul" voice or aura. This was popularized by a few people back in the day. One notable person that I could find is, Charles Sanders Peirce who wrote back in 1902:

"Give science only a hundred more centuries of increase in geometrical progression,
and she may be expected to find that the sound waves of Aristotle's voice have somehow recorded themselves"






OTHER Sources:

https://asa.scitation.org/journal/jas


++++++++++++++++++++++++++++++++++++++++
++++++++++++++++++++++++++++++++++++++++​


The Journal of theoretical and computational acoustics


++++++++++++++++++++++++++++++++++++++++
++++++++++++++++++++++++++++++++++++++++​



X0022460X.jpg
Journal of Sound and Vibration

++++++++++++++++++++++++++++++++++++++++
++++++++++++++++++++++++++++++++++++++++​

Applied Acoustics is a leading international journal that reports original scientific research in acoustics with broad impact in engineering applications
I must say this is a great and informative post, this was interesting to read and learn about sound. Thanks a lot!
Now I'm inspired to do something better.
 
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