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Post by seanbeasley on Nov 14, 2017 22:53:57 GMT
Evening All,
My name is Sean Michael (no, not that wrestler guy)—I have a question regarding panels.
I’m trying to figure out if there is a formula for panel placements (outside of the first reflection point).
I’m just finishing up my mix room in my basement. My basic room shell was framed out at 12x17 with a ceiling height of 9’8”
At 6’7” off the front wall is my 38% listening position. From that point towards the front wall I angled those two parts of the wall at 14 degrees. Wanted to go more but there is a window looking outside.
I’m attaching a picture of the plans so you can get a better picture of the room.
Also behind me there is a soffet that is as follows.
3’2.5” x 7’9” that comes down 2’ off the ceiling. I had to frame out the soffet because of HVAC being run under a triple LVL.
I’ve built (6) 15”x47”x6” acoustic panels to scatter throughout. I also built (1) that is the same dimensions but 5” deep.
I built (2) 30”x47”x5.5” panels for my first point of reflection.
Have one bass trap all done behind left shoulder and am working on another one for front left shoulder. I have 3” returns in front right and back position due to the window and a door. Any suggestions on treating those two corners would make my day.
I built an 18x18 diffuser for my door, and I’m placing my book shelf directly behind me for diffusion as well.
Sorry for the long post about a simple question. Just trying to give you a visual.
Best, Sean Michael Beasley
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Post by seanbeasley on Nov 14, 2017 22:57:46 GMT
JPEG is too big, will have to upload it when I get home.
Also I’m a carpenter/framer if I can be of any help to anyone.
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Post by Hexspa on Nov 15, 2017 2:37:06 GMT
Hi, Sean. Welcome to the AEF. There are formulas for the amount of recommended treatment but none for placement, of which I'm aware. The general guidance is to identify the axial modes which correspond to your room's dimensions and use that to help you identify likely problem areas. In reality, though, that's just extra (if helpful) data. Ethan strongly advocates for broadband treatment. By using this type of tactic, you should come to a fair result without targeting specific frequencies. However, by knowing which dimensions are contributing to what response (and where in your room), you can use that info to lock in your broadband placements. For instance, if your side walls are likely to produce a null at 150Hz at your LP, it's possible your rear dimension will give you a peak there. In that case, you might not want to treat your rear and side walls heavily. This is exactly what happened in my room. Of course, that could change depending on how much treatment you use, it's material composition, air gap and so forth. In short, I always suggest removing every non-essential object from the space, taking a raw measurement, then progressively adding treatment and measuring the result until the desired effect is obtained. When taking your raw measurement, be sure to do so in at least a 1' radius from what you hypothesize to be your ideal epicenter. By doing this, you'll be more likely to find the actual ideal spot and not just it's theoretical counterpart. Pics would indeed be helpful. You seem to be off to a good start with your quantity and types of panels already available. I'll just say don't be surprised if you end up building a few more Thanks.
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Post by rock on Nov 15, 2017 13:47:30 GMT
Hexspa has some good advice, I'll just add this standard stuff you may have missed: Your ceiling is also a reflection point(s) so consider a cloud or two there. For bass trapping, the 4 vertical corners are probably the least you should do, you have 8 other corners, (wall-ceiling and wall-floor) they are also potential bass trap positions.
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Post by Ethan Winer on Nov 15, 2017 18:41:50 GMT
I'll just add that there's no reason for a photo to be larger than 100 KB max.
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Post by Hexspa on Nov 15, 2017 20:06:30 GMT
I'll just add that there's no reason for a photo to be larger than 100 KB max. Someone should've told me this when I started uploading pics to my site. Bringing down image size brings down page size which yields quicker load times which, supposedly, yields more money (or, rather, less money lost). Turns out that last part is pretty significant but I'm still working on that.
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Post by Hexspa on Nov 15, 2017 20:10:05 GMT
Hexspa has some good advice, I'll just add this standard stuff you may have missed: Your ceiling is also a reflection point(s) so consider a cloud or two there. For bass trapping, the 4 vertical corners are probably the least you should do, you have 8 other corners, (wall-ceiling and wall-floor) they are also potential bass trap positions. Yes, and let's not forget the axial response of floor-ceiling boundaries. That has something to do with pasim's success, I feel, with his massive cloud absorber. What was it? 10" fluffy plus some rigid on top? lol he did not tread lightly but instead made more of a storm cloud!
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Post by seanbeasley on Nov 16, 2017 2:19:25 GMT
o here is the floor plan. Thanks for the advice. Very helpful
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Post by Hexspa on Nov 16, 2017 2:57:11 GMT
Quick note: Ethan make a video www.youtube.com/watch?v=vb30CICG68c in which he basically says books aren't diffusion - even if they're Acoustics books! (I guess, technically, if you had a bunch of books, all the same size, with an appropriately-sized bookshelf you could probably make a legitimate QRD well diffuser but then you really wouldn't ever want to move the books.) With that in mind, I'd say get rid of it if you don't need to have it there. That extra surface area can be put to better use by actual diffusion or absorption. Thanks.
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Post by seanbeasley on Nov 16, 2017 22:15:12 GMT
Thanks Hexpa, you’ve been a big help.
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Post by Hexspa on Nov 16, 2017 23:26:46 GMT
Thanks Hexpa, you’ve been a big help. Thank you too! You've been a great helpee
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Post by Ethan Winer on Nov 28, 2017 21:03:29 GMT
Almost daily customers and potential customers email me photos that are 3-5 MB each, which I need to save for future reference. It seems like I spend half my day reducing these JPGs to 50 KB, and they don't look any worse at less than 1/100th the size.
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Post by Hexspa on Nov 28, 2017 22:07:37 GMT
Almost daily customers and potential customers email me photos that are 3-5 MB each, which I need to save for future reference. It seems like I spend half my day reducing these JPGs to 50 KB, and they don't look any worse at less than 1/100th the size. Seems like you could set up some kind of automation macro. Either that or change your email address to SendSmallPicsOrDie@realtraps.com
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Post by Ethan Winer on Dec 12, 2017 18:46:20 GMT
The graphics editing software I use has scripting, but I wasted half an hour trying to figure it out so I just gave up.
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