#1647489 - 04/08/04 01:11 AM
Acoustic treatment of a music room.
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Cammo
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Registered: 04/07/04
Posts: 3
Loc: Australia
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HI Everyone,
I am from Sydney, Australia. I am a professional musician (well, drummer actually) eager to learn more about acoustic treatment.
I have been building a music room in a new house. The sound proofing has been done and i am thinking about acoustic treatment for when i move into the house, which will be very soon.
the room is 19' by 14' with 9' ceilings. The floor is concrete slab and all walls and ceiling are plasterboard. the rear wall is mostly a sliding glass door which i am going to cover with a thick wooden panel bifold door for sound insulation so this will be rather reflective.
I plan to put compressed fibreglass (3") diagonally over corners to trap bass frequencies. And some framed boxes (pegboard face) filled with the fibreglass on the walls around the room. Perhaps alternating with panels of the fibrglass covered with burlap for more absorbtion (cardboard backing facing in to wall or out to room?). Am i on the right track??
I have read a bit on the web, but i still have some questions:
1.) Am i better off putting lino on the floor rather than carpet? and if so, how do i treat the ceiling?? Full absorbtion or same as walls? If i suspend the burlap covered fiberglass from the cielings, am i best hanging it away from the ceiling say 4"?? Is cardboard better than a rigid panel. Cardboard side facing the floor or ceiling?
2.) I have read that the pegboard boxes work well over a fairly wide frequency range. Does it matter if the fiberglass absorber touches the pegboard (which is 1/8" thick), or should the pegboard be free to vibrate?? Should i put a panel on the back of these boxes and should the edges of the boxes be sealed??
3.) Is the burlap alone enough to keep the fiberglass contained??
4.) Is there anything that i have neglected that would be worthwile for a room such as this?
I mainly intend to use the room for serious band rehearsals/performance which will be mostly acoutic jazz . oh yeah and practice ofcourse .
I do not envisage the room to be a proper recording studio although i intend to do some recording.
I know that a good sounding room is a pleasure to play in, but what lengths should i go to seeing that recording is not the primary purpose??
Thanks,
Cameron
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#1647490 - 04/08/04 01:15 AM
Re: Acoustic treatment of a music room.
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Cammo
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Registered: 04/07/04
Posts: 3
Loc: Australia
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Also,if i use MDF panels instead of plywood (I will have do drill my own holes). Are the thicknesses still 1/8" for medium low and 1/4" for low frequencies?? And i assume that the less holes that i drill, the lower the absorbed frequencies? So , is it a good idea to make a varying pattern and number of holes across the panel to further increase the effected frequncy range?
Thanks
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#1647491 - 04/08/04 02:51 PM
Re: Acoustic treatment of a music room.
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Ethan Winer
MP Hall of Fame Member
Registered: 06/12/00
Posts: 5405
Loc: New Milford, CT, USA
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Cameron,
> I plan to put compressed fibreglass (3") diagonally over corners to trap bass frequencies. <
Good move.
> And some framed boxes (pegboard face) filled with the fibreglass on the walls around the room. <
The pegboard will just get in the way and reduce the effectiveness of the fiberglass. I think you're better off identifying those places that need absorption, and make those panels 100% absorptive instead of mostly blocked with the pegboard.
> Am i better off putting lino on the floor rather than carpet? and if so, how do i treat the ceiling?? <
Yes, a reflective floor and absorbent ceiling is better than the other way around.
> If i suspend the burlap covered fiberglass from the cielings, am i best hanging it away from the ceiling say 4"?? <
Yes, because that extends the absorption to lower frequencies.
> Is the burlap alone enough to keep the fiberglass contained?? <
Yes, I think so.
Have a look at the Acoustics FAQ, second in the list on my Articles page:
http://www.ethanwiner.com/articles.html
In particular, see the sidebars "Creating an RFZ" and "Hard floor, soft ceiling." These elaborate on the answers I gave above.
--Ethan
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