New space - studio in Athens
Posted: Thu Jul 12, 2018 7:43 am
Hi everyone, I am George.
Thank you for the time and the effort you all put into this forum!
I am reading the forum for some time now, also reading Rod Gervais book and I am in research of how to correct the acoustics of my room.
The room is 41m2 on a groundfloor in Athens - Greece and I am planning to use it mostly as a control room for mixing.
I am not soundproofing the room, just treating the inside for good acoustics.
I usually mix around 80-85dB loud with higher and softer volumes for short periods of time.
My monitoring system is a 2.1 ATC, with SCM20-2A monitors and SCM0.1/12 sub.
The budget has to be the lowest possible so I am using insulation, wood and other stuff I already have and I am building everything on my own.
Room's volume is 163m3.
Dimensions are 8.7m long, 4.4m wide, 3.95m high.
On north side around the 6th meter of the total length the room gets wider on the right side by 1.5m but that is now drywalled to create a storage room and leave the room with the dimensions mentioned above.
Ceiling's concrete joists are coming down off the ceiling 37cm.
Side walls' concrete studs (four of them) are coming out of the walls about 7-11cm, and front wall's stud is coming out 13cm.
The floor is concrete covered on tiles.
Things I have done so far:
-Installed the electrical stuff, outlets, lights, etc.
-Seperated (drywall) the small corner making it a storage room.
-Covered all the vertical and horizontal corners (front, back, sides), including the ones on the ceiling where the two joists are, with mineral wool rolls (air resistance of 5KPas/m2) of an approximate diameter of 45cm. I placed the rolls inside LDPE bags which for their density and thickness will provide 6dB reflection at the cuttoff frequency of 425Hz and +6dB/octave above it.
-I am now at the point of building the frame for covering the corner traps on fabric.
My next moves are (and this is the point where I seek some advice):
1-building the ceiling clouds. Three of them, placing them on the three blocks of the ceiling-inbetween the joists (that will leave a small gap between the corner traps and the cloud of about 7-10cm), all angled the same way-that would be all looking on the back wall where the door is, starting around 10cm off the ceiling and adjusting the other side accordingly. Making them hard-back, 3x1.5m big, 15cm deep or more if needed, filled with 30 or 40Kg/m3 stonewool.
2-Treating the first reflection points and adding broadband panels all over the room,many of them, making them 0.6m wide by 2.4m high, 15cm deep, leaving 5-10cm air gap behind them, 30 or 40Kg/m3 stonewool. Many of them, placed in sequence, leaving the wall treated with 50% uncovered area, i.e starting with a 60cm wide trap, then leaving 60cm untreated, then one more trap, and so on..
3-placing a big trap I already have on the back wall, it's size is 2x1.5m, 35cm deep, filled with mineral wool (air resistance of 5KPas/m2), placing it's center on back wall's mid-height/mid-width, and considering building in front of it an air transparent diffuser using wooden slats.
So regarding 1. What should I consider in order to know the angle, the depth and the starting distance off the ceiling for the cloud?
I understand that will be used for breaking room modes but whats the math behind it? maybe someone can point me in the right direction..
Would it be better to be opened back? i.e. no need to brake modes, etc, so i can just make big bass traps on ceiling (30cm deep+air gap) just to add to overall bass absorption.
2. Am I in the right track for the coverage, depths, gaps, dencity of wool?
3. Is that ok placing it there or is a better usage for it?
More, what do you think about the corner traps I placed so far, did I missed something or did something wrong?
I am attaching a floorplan, calculation of room modes, links for measurement of the empty room and full room, pictures and link for video of the progress, etc.
The measurement called "full room" was made with all my equipment,instruments,stuff and approx 15m3 of insullation being inside the room and covered on plastic membrane, as close to the back of the room (where the door is), leaving the front side 4.36x3m available for making the test with the speaker, mic, etc. It may not be usefull, I just thought at that time to take a measure of the full room so to see the difference between empty and full.
Also the "empty room" measurement is before the drywall of the storage. One big unseperated space with nothing inside.
Thank you in advance for your time.
Thank you for the time and the effort you all put into this forum!
I am reading the forum for some time now, also reading Rod Gervais book and I am in research of how to correct the acoustics of my room.
The room is 41m2 on a groundfloor in Athens - Greece and I am planning to use it mostly as a control room for mixing.
I am not soundproofing the room, just treating the inside for good acoustics.
I usually mix around 80-85dB loud with higher and softer volumes for short periods of time.
My monitoring system is a 2.1 ATC, with SCM20-2A monitors and SCM0.1/12 sub.
The budget has to be the lowest possible so I am using insulation, wood and other stuff I already have and I am building everything on my own.
Room's volume is 163m3.
Dimensions are 8.7m long, 4.4m wide, 3.95m high.
On north side around the 6th meter of the total length the room gets wider on the right side by 1.5m but that is now drywalled to create a storage room and leave the room with the dimensions mentioned above.
Ceiling's concrete joists are coming down off the ceiling 37cm.
Side walls' concrete studs (four of them) are coming out of the walls about 7-11cm, and front wall's stud is coming out 13cm.
The floor is concrete covered on tiles.
Things I have done so far:
-Installed the electrical stuff, outlets, lights, etc.
-Seperated (drywall) the small corner making it a storage room.
-Covered all the vertical and horizontal corners (front, back, sides), including the ones on the ceiling where the two joists are, with mineral wool rolls (air resistance of 5KPas/m2) of an approximate diameter of 45cm. I placed the rolls inside LDPE bags which for their density and thickness will provide 6dB reflection at the cuttoff frequency of 425Hz and +6dB/octave above it.
-I am now at the point of building the frame for covering the corner traps on fabric.
My next moves are (and this is the point where I seek some advice):
1-building the ceiling clouds. Three of them, placing them on the three blocks of the ceiling-inbetween the joists (that will leave a small gap between the corner traps and the cloud of about 7-10cm), all angled the same way-that would be all looking on the back wall where the door is, starting around 10cm off the ceiling and adjusting the other side accordingly. Making them hard-back, 3x1.5m big, 15cm deep or more if needed, filled with 30 or 40Kg/m3 stonewool.
2-Treating the first reflection points and adding broadband panels all over the room,many of them, making them 0.6m wide by 2.4m high, 15cm deep, leaving 5-10cm air gap behind them, 30 or 40Kg/m3 stonewool. Many of them, placed in sequence, leaving the wall treated with 50% uncovered area, i.e starting with a 60cm wide trap, then leaving 60cm untreated, then one more trap, and so on..
3-placing a big trap I already have on the back wall, it's size is 2x1.5m, 35cm deep, filled with mineral wool (air resistance of 5KPas/m2), placing it's center on back wall's mid-height/mid-width, and considering building in front of it an air transparent diffuser using wooden slats.
So regarding 1. What should I consider in order to know the angle, the depth and the starting distance off the ceiling for the cloud?
I understand that will be used for breaking room modes but whats the math behind it? maybe someone can point me in the right direction..
Would it be better to be opened back? i.e. no need to brake modes, etc, so i can just make big bass traps on ceiling (30cm deep+air gap) just to add to overall bass absorption.
2. Am I in the right track for the coverage, depths, gaps, dencity of wool?
3. Is that ok placing it there or is a better usage for it?
More, what do you think about the corner traps I placed so far, did I missed something or did something wrong?
I am attaching a floorplan, calculation of room modes, links for measurement of the empty room and full room, pictures and link for video of the progress, etc.
The measurement called "full room" was made with all my equipment,instruments,stuff and approx 15m3 of insullation being inside the room and covered on plastic membrane, as close to the back of the room (where the door is), leaving the front side 4.36x3m available for making the test with the speaker, mic, etc. It may not be usefull, I just thought at that time to take a measure of the full room so to see the difference between empty and full.
Also the "empty room" measurement is before the drywall of the storage. One big unseperated space with nothing inside.
Thank you in advance for your time.