I work in a company that makes commercials etc. We need acoustic treatment for a room with a purpose of doing some voice over recordings and audio mixing. On one of the tables we are going to place 2 rokit RP8:s.
We have bought some bass traps, some diffusers and some absorbers and need help/suggestions in the placement of these panels and for the placement of the microphone. The room is about 3 meters high, 2,5m wide and 4m long. Or 9 feet 10 inches high, 8 feet and 2.4 inches wide and 13 feet and 1.5 inches long. The walls are quite thick concrete, and there is a closet with a door on the right side of the door so there we can't place bass traps etc except from like higher than 2m.
In this link you will find the blueprint of the room and what we ordered for the room: https://imgur.com/a/ZHnxC
All help is highly appreciated!
Acoustic treatment for a room for voice over recording
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VideolleOskari
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Soundman2020
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Re: Acoustic treatment for a room for voice over recording
Hi there "VideolleOskari", and Welcome! 
http://www.johnlsayers.com/phpBB2/viewt ... 11&t=13069
http://www.johnlsayers.com/phpBB2/viewt ... 7&p=120902
Those threads are both useless now, as the posters did not follow this rule.
The layout you are showing in your diagram, would be very, very wrong, acoustically.
Now for treatment:
First, the portable reflection filter is no use. If you do not believe me, read this article that was done by Sound on Sound magazine a while back: http://www.soundonsound.com/reviews/how ... cal-booths It is a test of several such devices, done under controlled conditions in a proper acoustic test laboratory. The result: "The differences are subtle, and sometimes it is hard to say whether the sound with the screen in place is better or worse than without. ... What is clear is that none of the screens produce something that would be mistaken for anechoic singing.". To start with, all of those go on the WRONG side of the mic and vocalist! The place where you need treatment is BEHIND the vocalist, in the direction the mic is facing, not on the other side! This is very obvious, when you think about it... Since most vocal mics are cardiod or super-cardiod, they are not sensitive at all in that direction....
So forget that. No use, waste of money.
Next, forget the diffusers. Diffusers do work, and they are useful... just not in your room. The room is too small for diffusers to be any use. I use them in many of the rooms that I design, but only if the room is big enough.
So don't get the diffusers: they would not work well for your room, and would probably make things worse.
Next, the speaker isolation pads: Those are angled, and tilting your speakers is NEVER a good idea. Rather, get simple Sorbothane speaker pads. Sorbothane is the best possible material for isolation speakers. I use it all the time in my speaker mounting systems.
Other treatment: You will need to stack up the bass trap wedges from floor to ceiling in all four of the vertical corners of the room. That's the very first step, and the most critical.
You will also need to put very thick absorption across most of the rear wall, between the bass traps. At least 15 cm thick, but more would be better.
Then you will need to put some 100mm thick absorbers between the speakers and the front wall. Those panels will need to be about a meter wide and 2m high, centered exactly behind the speakers.
You will also need very thick absorption panels on the side walls, at the first reflection points, and also on the ceiling at the first reflection point. When you have done all of that, run an acoustic test of your room using REW. Here are the instructions for doing that: http://www.johnlsayers.com/phpBB2/viewt ... =3&t=21122
When you have the results, let us know so we can download the data and analyze it, then give you suggestions on the next steps in treating your room.
- Stuart -
Please check the forum rules for posting. Your images must be included within your own thread, uploaded onto the forum itself. If not, then this is what happens:In this link you will find the blueprint of the room and what we ordered for the room
http://www.johnlsayers.com/phpBB2/viewt ... 11&t=13069
http://www.johnlsayers.com/phpBB2/viewt ... 7&p=120902
Those threads are both useless now, as the posters did not follow this rule.
So, you are going to use this room for TWO things: First for VO recording of voices, and second for mixing. In other words, it is a single room studio that must have the acoustics of a control room, and also be good for recording vocals. Is that correct?with a purpose of doing some voice over recordings and audio mixing.
Do not ever put your speakers on the desk, nor on top of a console meter bridge, or dog box! Speakers should go on stands BEHIND the desk, and the stands must be very massive (heavy). If you put the speakers on the desk, that will create many types of acoustic artifact that distorts the sound badly, so you will not hear the clean sound from the speakers: you will hear sound that has been "colored" and changed by the presence of the desk.On one of the tables we are going to place 2 rokit RP8:s.
Before worrying about that, you first need to get the room laid out properly for mixing, which means locating the speakers and the mix position correctly. Here's the correct theoretical positions for your room:need help/suggestions in the placement of these panels and for the placement of the microphone
The layout you are showing in your diagram, would be very, very wrong, acoustically.
Now for treatment:
I really hope you can cancel that order! You are ordering some good stuff, yes, but some of it is a useless waste of money, and some of it is no use in your room.In this link you will find the blueprint of the room and what we ordered for the room:
First, the portable reflection filter is no use. If you do not believe me, read this article that was done by Sound on Sound magazine a while back: http://www.soundonsound.com/reviews/how ... cal-booths It is a test of several such devices, done under controlled conditions in a proper acoustic test laboratory. The result: "The differences are subtle, and sometimes it is hard to say whether the sound with the screen in place is better or worse than without. ... What is clear is that none of the screens produce something that would be mistaken for anechoic singing.". To start with, all of those go on the WRONG side of the mic and vocalist! The place where you need treatment is BEHIND the vocalist, in the direction the mic is facing, not on the other side! This is very obvious, when you think about it... Since most vocal mics are cardiod or super-cardiod, they are not sensitive at all in that direction....
So forget that. No use, waste of money.
Next, forget the diffusers. Diffusers do work, and they are useful... just not in your room. The room is too small for diffusers to be any use. I use them in many of the rooms that I design, but only if the room is big enough.
So don't get the diffusers: they would not work well for your room, and would probably make things worse.
Next, the speaker isolation pads: Those are angled, and tilting your speakers is NEVER a good idea. Rather, get simple Sorbothane speaker pads. Sorbothane is the best possible material for isolation speakers. I use it all the time in my speaker mounting systems.
Other treatment: You will need to stack up the bass trap wedges from floor to ceiling in all four of the vertical corners of the room. That's the very first step, and the most critical.
You will also need to put very thick absorption across most of the rear wall, between the bass traps. At least 15 cm thick, but more would be better.
Then you will need to put some 100mm thick absorbers between the speakers and the front wall. Those panels will need to be about a meter wide and 2m high, centered exactly behind the speakers.
You will also need very thick absorption panels on the side walls, at the first reflection points, and also on the ceiling at the first reflection point. When you have done all of that, run an acoustic test of your room using REW. Here are the instructions for doing that: http://www.johnlsayers.com/phpBB2/viewt ... =3&t=21122
When you have the results, let us know so we can download the data and analyze it, then give you suggestions on the next steps in treating your room.
- Stuart -