Home Studio Acoustics: Why You Can’t Calculate How Much Treatment You Need - AcousticsInsider.com
Вставка
- Опубліковано 24 тра 2022
- ►► Download the FREE Home Studio Treatment Framework and get everything out of your room and speakers → www.acousticsinsider.com/home...
Wouldn’t it be great if there was an app or piece of software out there that just calculates the acoustics in a room?
You just plug in the size of your room and it spits out where you put absorber panels and diffusors.
Surely that should be possible right?
But somehow that magic piece of software hasn’t shown up.
And unfortunately I doubt it will any time soon.
At least anything useful for us home studio DIY folks.
The math, of course, is out there. And so is acoustics software.
So in this week’s video, I want to show you how acoustic treatment is usually calculated, why it all comes crashing down when you try to apply it to a spare bedroom, basement or attic, and what to do instead.
Related blog post on Acoustics Insider:
www.acousticsinsider.com/blog...
Resources in this video:
amcoustics.com/tools/amroc
amcoustics.com/tools/amrev/
Acoustics Insider on Social Media:
/ acousticsinsider - Розваги
very very interesting as usual. The part I adore is the fact that you do not come up with something miraculous. I also kind of like your perfect english with this nice German accent. Well done as usual
I think its just as important to understand your space as much as it is to treat it. Treating a room is only part of the puzzle, knowing the room - really understanding it - is the last piece.
I actually took time to read Master acoustic handbook, and now i I understand what are you talking about for the first time. And I was watching your video for years without understanding anything 😂 Anyways, it’s even more entertaining and helpful now that I kind of know what are you talking about. Keep up the great content!
Thank you Jesco! Very informative.
Thanks, Jesco, fascinating as always.
Excellent work, thank you !!
How many panels do you have in the room that you are speaking in? Do you have any 2 ft by 4 ft by 4-in thick bass traps in there?
Just curious, but why do you recommend getting acoustic panels in groups of three? For example, would five panels not be effective since it's not a multiple of 3?
Concrete bunker/wall is nof fully reflective. Concrete has around 30-35% absorbtion across all freq.
I have it in the back of my mind that you offer some kind of video courses, but I couldn't find it on the website.
Am I wrong?
Awsome as usual Jesco! I wonder at what point a room falls into the "not small" category? In other words, what sort of dimensions are we looking at when we talk about a "large" room (not a stadium though)
An acoustically small room is one where the wavelengths being produced don’t fit inside the room and therefore “stand” because they can’t propagate
Small is anything smaller than 1500 cu ft. In volume. Lxwxh
Ideally you’d want a dimension 18ft long which is about half length of 40hz wave. If I built a room it would be 23x17x10.
What happens when the room is too short? Better than when too narrow? Can I have a “fair” room as small as 2.6 x 3.7 m?
Slightly off topic but I’ve been looking at properties to purchase so I’ve been paying special attention to floorplans and punching them into AMROC and something I’ve noticed is this: I know we say the bigger the room the better, and I think it’s because more diffuse, right. But when you get to a length of more than around 420cm your lowest standing wave dips below 40hz which makes it harder to tame with absorption. At this length, to get a good distribution of modes (Bonello) this corresponds to a width of around 300cm (with a standard Australian modern roof height of 240cm) and this all seems very workable. But my question is, what’s happening to the frequencies below 40hz? Obviously the speaker is still pushing air and we can hear those frequencies. Are they still causing problems for us that are not related to standing waves that mean I should still go for a bigger room?
sorry it's not Jesco replying but this is my 2 cents. I guess anything below 60Hz, you'd have to check with a good pair of headphones. And also maybe visually monitor your master bus. Also maybe the mastering engineer will be able to control that low end for you.
It seems like, at least for a voice production studio, you just end up at the oft-quoted advice of: "If it sounds good, it is good."
Jesco, I have a question: when choosing an insulation material for deep absorbers (80-90cm) is there any difference between mineral wool, rock wool or fiberglass wool when it comes to their density and acoustic properties? Does 30kg/m3 mineral wool work the same as 30kg/m3 fiberglass?
Slug and glass fiber have different densities so of course they will have different porosity and flow resistivity. From data easily found on the web fiber glass will have double the flow resistivity.
I have zero experience with acoustics but one idea I had was to make a spaced layered absorber. When you truly have 1m of space for absorption, you don't really have to fill the whole space with absorbing material. The idea is to hit the areas of low pressure and high velocity for all frequencies (at quarter wavelength distance from the wall). Acousticmodelling shows that placing just 5cm of standard acoustic foam (10kPa) at 1m away from the wall really nails the 85-90Hz range. If you palce a few layers, at 100cm, 50cm and 25cm, they seem to add up to a broadband absorber. Again, purely theoretical, but very interesting and will only cost you 15cm of foam instead of 100cm of rockwool.
@@Kobrar44 thanks!
Yes - it is not RT60, it is called ''mean free times'' , cause there is no real free field in small rooms.
@AcousticsInsider pls say "Schroeder frequency" one more time :D
Best acoustics channel on UA-cam.
How thick panels as a default? One guy made it with 40 cm, big studio, after recommendations from consults in audio treatment.
An audio engineer told me 12.7 cm minimum
Because people don't want to understand that each surface walls, ceiling, floor has to have at least 50% wall coverage of the right treatment to make a significant improvement in a room. Also, it depends on usage, it depends on how your room is constructed. If your walls and ceiling were designed to absorb low frequency problems down to 30hz, then you would only have to deal with mid range and high frequency reflections. But most homes are NOT designed for audio applications. They have thin walls that can only isolated so much energy above 125hz, so you either have to reconstruct with better wall designed to absorb the amount of energy so there aren't any room modes.
I don’t have any of my floor covered, and I have significant improvement
@@dougleydorite Do you have carpet on the floor? Each of the t6 surfaces represent about 17% each to the sound of the room. You have to look at the Axial modes first as they are typically the largest problems in terms of peaks and nulls at given frequencies and because Axial modes are unwanted pressure between 2 wall surfaces, you have to identify which frequency you have a problem, which 2 surfaces that frequency is between, and then treat accordingly.
Typically in 8ft ceiling rooms, there's a 70hz problem between the floor and ceiling.. If you don't treat at least one of those two surfaces with something that will absorb 70hz effectively, then you will still have that problem.
Of course you can have significant improvement, but that doesn't mean you don't have any problems. You still will have problems, it's either than you put the proper treatment on the ceiling to go after than Floor to Ceiling problem, or you didn't.
A "significant improvement" is kind of nebulous term. For what I think is significant and you think is significant might be drastically different. I may think that you still have major problems you haven't addressed, even you think you did.
did you conduct measurements to find out what frequencies you have problems with and which surfaces those problems are between and use appropriate treatment to go after those problems? Or did you just put up a bunch of treatment, which will do something, it just might not fix all of the problems in the room, I see that all the time. Yes, it sounds better than with no treatment, but it still has problems.
Judging whether you addressed all of the problems has to be addressed and you can take measurements to make sure they've been addressed.
@@Oneness100 and once you add treatment, the game changes. It's when the play moves to your favor that success is gained. I agree with you on taking the time to create a great room. But it is time, and money...
@@Oneness100 I have laminate flooring. I have absolutely measured and all that good stuff. I have a thread going on gearspace of all of my progress and where I'm at currently, including REW MDAT
@@dougleydorite That's nice. How low are you trying to get ambient noise levels down to? How flat of a room response curve are you trying to obtain? And can you measure flat no matter where in the room you are taking the measurement from?
The more i read about it, the it seems like a crap shoot ;-)
I have a living room, wrong layout, obviously cabinets, an L shaped couch etc etc. I just about gave up on acoustics here. It wounds great at the moment, so i think i ll leave it alone