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Small room treatment done Studio Headphones
Old 2nd January 2011
  #1
Gear Head
 

Small room treatment done

Hi Guys.
I have trated my small room (L 300 cm D 300 cm H 240 cm).
Front and side wall in bricks, left and rear plasterboard.
The tratment is shown in the picture +
- ceiling covered with foam (it was already there)
- 2 broadband absorbers on reflection points (7 cm depth)
- Rear wall covered of foam (it was already there).




I have played with speaker position with a RTA and I found the best (or the best compromise...).

This is the result



Quite happy with the bass improvment but as you can see there is a dip
at 73 Hz. Is this a deep?

This cause a "punch poor" listening.
Any suggestion about?

Thanks
Old 2nd January 2011
  #2
Lives for gear
 
Jens Eklund's Avatar
Quote:
Originally Posted by nervousfede View Post
Quite happy with the bass improvment but as you can see there is a dip
at 73 Hz. Is this a deep?
Yes,

≈ 20 dB is quite a severe dip. You need to also look at the time aspect of the response so a waterfall plot would be useful (check some other threads if you don’t know how to generate one).
Old 2nd January 2011
  #3
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gullfo's Avatar
 

i would put a big cloud (1200mm x 2400mm) over your position - 100mm rigid insulation backed by 19mm MDF and angle it so it's nose down over the desk and angled up (somewhere between 15-30°) to the ceiling in back and hang it down about 150mm. your room height is the likely culprit and the hard backed cloud will help. adding a cut away for the lights (and/or reposition slightly) and the corners. leave a gap all around of at least 300mm. you want this cloud to disrupt the room mode...
Attached Thumbnails
Small room treatment done-nervousfede-cloud.jpg  
Old 3rd January 2011
  #4
Gear Guru
 
Glenn Kuras's Avatar
Quote:
Originally Posted by gullfo View Post
i would put a big cloud (1200mm x 2400mm) over your position - 100mm rigid insulation backed by 19mm MDF and angle it so it's nose down over the desk and angled up (somewhere between 15-30°) to the ceiling in back and hang it down about 150mm. your room height is the likely culprit and the hard backed cloud will help. adding a cut away for the lights (and/or reposition slightly) and the corners. leave a gap all around of at least 300mm. you want this cloud to disrupt the room mode...
Agreed on the "culprit", but I would try to avoid a MDF backing on it.
Old 4th January 2011
  #5
Gear Head
 

Waterfall and more. Hope they are useful and clear.


Old 4th January 2011
  #6
Gear Addict
 

Would like to hear more about the mdf backing or not for the cloud suggested.

Has there been any testing as a resource for or against absorber backing similar to this case?
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