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Using a measurement mic to improve room acoustics? (pg. 2)
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| Storyteller |
Why use pink noise instead of white noise?
From what I've learnt white noise is equally powerfull across the spectrum and others aren't?
Hope you can tell me why :)
Looked it up, pink noise decreasis in power when the frequency goes up: http://en.wikipedia.org/wiki/White_noise ;)
See the references to other types of noise on the right. |
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| LfmC |
| quote: | Originally posted by Storyteller
Why use pink noise instead of white noise?
From what I've learnt white noise is equally powerfull across the spectrum and others aren't?
Hope you can tell me why :) |
Both can be used, but pink is much easier on the ears imo ;) |
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| LfmC |
| quote: | Originally posted by Derivative
m8 is a bi directional capsule. Dont use this because it rejects sound from the sides. If you think it mirrors the position of your ears be aware that your ears don't reject sound directly in front or behind you. Don't use a cardiod either (rear rejection).
You need to use an omni mic which is equally sensitive to sound from all directions.
Run pink noise out of your speakers and observe a spectrum of it. Be careful with your ears and don't play it too loud. Place the mic approximately where you are sitting. Record the pink noise coming out of your speakers and run a spectrum analysis of the recording. It should be flat as pink noise has equal power in all octave bands. If it isn't flat then that is because of the influence of the room ( modes, standing waves etc.).
You can equalise the spectrum so it is flat and this is one way of compensating for ty room acoustics (it isn't a permanent fix but it does work provided you know what you are doing and don't it up). However, the equalisation you perform only applies at the the point of the mic so if you move around then it will all go ed up. You will need to sit still when monitoring. Also be aware that your ear is not equally sensitive to all frequency. The point of equalising a room is to try and create some sort of consistency between what you see on screen (like a spectrum) and what you hear.
The best solution is to treat your room properly but this is expensive and to do it properly would probably require you to partially rebuild your house. |
m8 = mate = friend :D
The mic is ecm8000 and, ofc, it's an omni mic designed for measuring. Thanks for the advice. Will give it a shot and see what happens.
Also I managed to find this: RoomEQWizard
It's quite a complicated app, but AFAIK it does pretty much exacly what I need. Automaticaly measures and corrects the freq. without adding adding new problems (how? no idea but it does more than EQing)
Did I mention it's free? :) |
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| Storyteller |
| quote: | Originally posted by LfmC
Both can be used, but pink is much easier on the ears imo ;) |
Yes I agree on that but wouldn't that just colour the results as well?
On the other hand it does make sense, the higher in the frequency range you go the less you have to deal with standing waves or cancellation. Pink noise seems like a more comfortable solution and probably sufficient as well. Unless a tool requires a specific type of noise (duh) :). |
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| Derivative |
| quote: | Originally posted by Storyteller
Why use pink noise instead of white noise?
From what I've learnt white noise is equally powerfull across the spectrum and others aren't?
Hope you can tell me why :)
Looked it up:http://en.wikipedia.org/wiki/White_noise ;) |
Dont use white noise.
http://en.wikipedia.org/wiki/Colors_of_noise
| quote: | Originally posted by LfmC
m8 = mate = friend :D
The mic is ecm8000 and, ofc, it's an omni mic designed for measuring. Thanks for the advice. Will give it a shot and see what happens.
Also I managed to find this: RoomEQWizard
It's quite a complicated app, but AFAIK it does pretty much exacly what I need. Automaticaly measures and corrects the freq. without adding adding new problems (how? no idea but it does more than EQing)
Did I mention it's free? :) |
Cool. For some reason I thought you had an M8 cap. Silly me. |
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| Storyteller |
I was about to say that this page doen't explain it at all :). Read it again and it makes sense. Thanks :). |
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| Eldritch |
| quote: | Originally posted by richg101
not really. a good set of monitors that perform and give a good response will yield better results than ty ones in the best dampened room. most clubs dont have proper acoustic treatment, so why is it 100% neccesary in studios to get a benefit from expensive monitors?
with well positioned speakers, a pair of curtains and some furniture will be more than enough room treatment for a home studio imo. |
I didn't say he should have bought ty monitors. I'm just saying he's not getting his money worth in an untreated room.
If you think a couple of curtains will do any good you're terribly mistaken. Curtains will only absorb around 10kHz and up.
Clubs aren't used for critical monitoring so I don't know why you're using a club as a comparison. |
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| LfmC |
| quote: | Originally posted by Eldritch
You bought monitors for $2000 and won't do any acoustic treatment? That's a serious waste of money. |
Like i said: I'm gonna treat the room. Just not in the next month or two. But even then, my choices are limited. I've got a room 4m x 4,4m x 2,6m. The monitors are roughly in the center of the room (not dead center ofc) and I can't move them. Also rearranging the room is not an option, but AFAIK this is a good position already (monitors away from walls). So best I can do is use some bass traps in the corners and some acoustic foam (or whatever it's called) behind my seating area.
My room response isn't awfull btw, but like any home studio, could sound a lot better. |
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| Beyer |
Use roomeqwizard to see how your room performs. Then move your monitors and sitting position slightly, to see if there is any positive change in the response.
I have a terrible phase cancellation issue in my room @80hz aprox. I made a big bass trap that I placed behind my sitting position, and that helped a bit.
I'm going to clear out my room soon, lay down a floating floor, removing the window, and making a number of bass traps to place in the corners, crucial areas on the walls etc. Maybe even a diffuser in ceiling. :p
Making your own bass traps is fairly easy, and doesn't cost much, in comparison to "pro" ones. Here's a website that can give you some ideas. |
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| CReddick |
| quote: | Originally posted by Beyer
Use roomeqwizard |
Can someone please mirror the downloads (win/OSX)? I don't really want to sign up for hometheatrebull.com |
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| Orpheus Is Dead |
Cheap GHETTO quick fix:
-used by me and my friends when we jammed in high school.....
1) Buy a load of those huge egg trays
2) cover your walls and with them.
3) save money for something better. |
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| Derivative |
Egg cartons don't do and covering your walls with them turns your room into a giant fire hazard.
Back when I used to live in a cottage and had a real fire place I used to use egg cartons as kindle because they burn so damn hot and fast. And you can set them off with the end of a cigarette. |
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