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room acoustics - looking for ideas
Okay I was checking out my studio's room acoustics today. I just used a sin
wav at a moderate amplitude and slowly swept through the audible ranges. I found some incredibly big antinodes (areas of constructive interference - right?) at my normal listening position (mostly mid-low freqs). Despite a large investment of time I've been unable to come up with a decent solution. Before I go on, let me explain the setup. Room is 9X8 feet wide and 8 ft high. Desk is setup along the LONG wall. Monitors are Yorkville YSM-1s. Pre-existing acoustic treatment is as follows: two corner bass traps behind the monitors, Primacoustic "Orientique Washboard" on walls to either side of monitors (mid point along wall), no name brand square of heavy foam centered on back wall covering ~ 60% of area. Floor is hardwood with medium weight carpet on area not occupied by the desk. Behind the monitors is a window covered by wooden shutters. Walls are this disgusting stringy twine-like wallpaper which I'm itching to tear off soon. Monitors are about 2 feet from side walls, 1 and a bit from the back, and a little over 2 from one another. I checked to make sure it wasn't my soundcard or source, frequency response through headphones was excellent. Checked to make sure it wasn't the monitors themselves - tried them in my basement and response was much more level...no can't move studio down there =( If I stand up from where I typically sit and listen the freq. response is much better (but monitors aren't pointed at my ears here so how much of this is direct?). I tried moving the monitors away from the back of the wall which helps a tiny bit but not much. Best I managed was with the monitors dead center in the room... and that's not going to leave me any space to move =) I've found very few resources on this stuff so far, but I've read here and there about some room node calculation software. Would such a tool be of use to me? Am I going to have to delve deep into the physics of sound to solve this (which I'm perfectly willing to do) or is this room destined to be poor for mixing? Any suggestions with respect to further room treatment, monitor placement, or otherwise? Anything I forgot to mention that will help you help me? Thanks, Dave |
#2
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room acoustics - looking for ideas
Dave,
I found some incredibly big antinodes This is common, and all small rooms like yours have this problem. The short answer is you need bass traps, and small rooms need more trapping than larger rooms. A more complete and detailed explanation is in my Acoustics FAQ: www.recording.org/users/acoustics I've read ... about some room node calculation software. The article above includes this link to my mode calculator: www.ethanwiner.com/MODECALC.EXE See the program's online help for an explanation of room modes that goes beyond what's covered in the article itself. --Ethan --------------------- www.realtraps.com The acoustics experts |
#3
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room acoustics - looking for ideas
YIKES. A cube is the worst possible shape for a room, acoustically
speaking. Definately check out Ethan Winer's article & room mode calculator. Also my "bad acoustics with examples" article: http://www.prosoundreview.com/forum/...hp?threadid=37 should help you recognize what bad acoustics sound like. Regards, Mark -- http://www.marktaw.com/ http://www.prosoundreview.com/ User reviews of pro audio gear |
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