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Posted by Romy the Cat on
02-14-2010
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fiogf49gjkf0d
I wonder, do cathedral ceilings has any acoustic focusing effects?
Theoretically the vertical reflections shall bubble themselves up but in practically I have no knowledge how the Cathedral Rooms behave. Did anybody try to analyze how Cathedral Ceiling behave acoustically and then to cancel the influence of the Cathedral Ceiling with false ceiling? If anybody know any data on the subject of have own experiments done then, please, share.
I get a feeling that in larger Cathedral Ceiling room my principle of using HF sails still will be very beneficial but at this point is just a guess… The Cat
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Posted by Paul S on
02-14-2010
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fiogf49gjkf0d As one might suspect, the vaulted ceilings eat and augment the sound in totally unpredictable ways. Hard to say if sails would help or they might eat the wrong frequencies. I would start by trying to get the room as hyped up as I could and then start backing off on the elements I perceived as "too much". I dealt with this two houses ago, and I never padded or "treated" a big wall that was totally covered by a mirror, just because I wound up needing that big hard surface to keep the energy going in the listening area. I think I mentioned back a ways that the best energy in my present listening room is very near the first reflection point on the ceiling, about 2 feet away from it and 2 feet below the damned ceiling! Vaulted ceilings can help with a kind of "soundstage" portrayal, but they can be quite the bitch to really load usefully.
Best regards,
Paul S
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Posted by Romy the Cat on
02-14-2010
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fiogf49gjkf0d
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Posted by tuga on
02-15-2010
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fiogf49gjkf0d
Hi Romy,
From a geometry perspective, having a two planes in the ceiling will increase reflections and whether these reflections will target the listener area higher or lower in the Z (vertical plane) depends on their angle.
Instinct tells me that you should add a several transversal ribs to to the vaulted surfaces for diffraction.
Cheers,
R
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Posted by el`Ol on
02-16-2010
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fiogf49gjkf0d The vaults of palace room in the islamic world make them very useful as music performing rooms. But they are kind of a "fractal" version of a gothic cathedral that works over a broad frequency range.
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Posted by Romy the Cat on
02-17-2010
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fiogf49gjkf0d Among many exiting features of the room that I have in my target there is one that among others features made me to live the room from the first sight. The Cathedral Ceiling has a very interesting ledge at the perimeter of ceiling. When they built 17 years back they did it juts for architectural fan as it serve no purpose. Well, they hide lighting fixtures on the Ledge that beam at the top of the ceiling but invisible from ground. This itself is nice but from acoustic perspective I think this ledge is a phenomenal tool. If how I think is the way how it will work then loading the ledge with absorber/defuses would allow mitigating the amount of HF nose I will be picking from the ceiling. The most wonderful thing that by doing it I will be able to hide the acoustic treatment at the Ledge and do not ruin a living room by with audio installation efforts. I am not sure if it works properly but it was very much in my mind what I first saw the room…
The Cat
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