Hi all Audio Circle members.
Yes, I am back,
but this time no one can call me a complete audio treatment ignorant.
Yes, I know, no one did call me an ignorant, but maybe some of you thought about it… (LOL).
After many, many… Several hours of reading, I am now less ignorant about audio treatment and most important; less confused about conflicting statements of different audio treatment experts.
When reading the results of my findings, you can jump in anytime, if you think I am wrong, because who said I was always right, not me for sure…
I think I will go with a non parallel walls and a slanted ceiling.
Of course, that will depend on the extra money the contractor will charge me for this (exotic) option.
(Exotic to him, he probably never been asked before or in his whole life to build something like that.)
Try to picture this or take a pen and a piece of paper and draw a sketch:
My front wall (Speaker wall) will be 4m/13’, my back wall will be 5m/16’ the length will be 6.5m/21’, now the ceiling will be from 2.55m/8’4” at the speakers end to 3m/9’6” at the other end.
Yes, I know, that’s quite a large room, but if I have the space, then why not?
By having a large listening room, I will avoid many acoustic problems found with a smaller room.
I will buy a SPL meter with a sine waves audio generator to find where the peaks and the dead spots are. Those two items are not expensive. They will cost me less than 100USD.
Corner bass traps. (AC01A)
I am not 100% sure which is better, the floor to ceiling approach or the partial one (50%).
I am sure that having the bass trap not symmetrical to the corner is good.
I am sure that the front of the bass trap will have 2 to 4” of rigid fiberglass sheets with the back of the panel being empty; however, I am not sure if I should have some fiberglass sheets on back the walls, behind the bass trap.
Experimenting will not cost much; therefore, I will try the two different approaches and hear the difference.
Absorption panel. (AC02)
The same as bass trap, however, the frame will have some slots or openings on all sides, since they will be hanged on the wall,
there will be air spacing between the wall and the fiberglass sheets.
<< A) Back holding thin cotton sheet.
<< B) Two layers of 2” fiberglass rigid sheets.
<< C) Burlap.
<< D) Frame. (Estimated size 24 X 48”.)
The corners will be rounded for beauty purpose.
Diffusers. (AC01)
They should be called reflector and I don’t think I will need them, mainly because of the size of my listening room and the fact that no walls/ceiling will be parallel. However, if I need some, I have two inexpensive way of doing them and most important, I can get here in Vietnam the raw material to build them.
Ceiling absorption panels. (AC03)
This contraption is my idea and the design is based on what I saw on the Internet, it’s similar to an unfinished basement ceiling with the 10X4 beams. Again, easy to build, several panels can be screwed to the ceiling.
Now let’s not forget the floor.
Because the floor will be a Vietnamese floor, which is 12” of armored concrete with ceramic tiles.
I have a few rugs lying around in my house, however, they are IKEA style carpet, therefore not very thick, no long hair and/or fluffy.
I thought of putting under the short hair rug another rug as an under cushion mat. (Worn out ready to be thrown away, anyway…) but that might not be a good idea. I am trying to avoid the expense of buying a new rug or carpet. Carpets and rugs here in Vietnam are expensive, because they are imported.
Vietnam do not make here carpets and rug yet, actually there lots of things that Vietnam still don’t make here, even with the cheap labor.
Of course I will have an electric panel dedicated only for the listening room.
My GR Research V1 and V2 OB speakers will be 5 to 7’ from the wall and 6 to 8’ away from each other and about 3’ from the side wall and everything will be symmetrical.
Listening chair will be about 8’ from the speakers, but all that can be move around for optimization of the audio results.
Well that’s about it, I think I have covered everything.
Any questions, comments, suggestions or anything you want to know? SHOT them at me !
I promise I won’t get upset and/or frustrated… (LOL)
Tomorrow I am having a meeting with the architect to see how he can integrate my listening room to the house.
Wish me good luck, because I will need it, it’s the fifth time he’s redoing the blue prints.
The Vietnamese have been building houses the same way for centuries, therefore, when you ask them something different, they don’t understand what you want and they don’t understand why you want to do it differently, they say:
What’s wrong with our (Vietnamese) way of doing?
I am surprised that after 16 years in this country I have not strangled a single Vietnamese…. (LOL)
Guy 13
