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250hz and down foam treatment
Old 10th July 2019
  #1
Here for the gear
 

250hz and down foam treatment

Hi all

I'm looking to acoustically treat my home studio room 250hz down

Does anybody know how effective
30cm thick 45cm width
acoustic foam panels would be ?

If I mount it to mdf and straddle the corner top to bottom maybe ?

Thank you all
in advance
Old 13th July 2019
  #2
Lives for gear
I’m guessing that you aren’t getting responses because a detailed answer would require more information about the dimensions and layout of your room.
I was interested to see whether any of the acoustic experts who respond on this forum would give you a general answer, but that hasn’t happened.
From my less than expert perspective, your proposed room treatment would be largely ineffective over the range you specify. It might have some effect at the very top of your range, but it would lose any effect rapidly below 250Hz.
I think backing the foam with mdf would tend to lessen the effectiveness of a corner trap at some frequencies as it eliminates the effect of the air gap behind the panel.
Overall, your proposal doesn’t seem to be in line with common practices for controlling low frequencies in listening rooms and studios.

Last edited by Bushman; 13th July 2019 at 04:42 PM.. Reason: Clarity
Old 22nd July 2019
  #3
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Quote:
Originally Posted by Bushman View Post
I’m guessing that you aren’t getting responses
Hej bushman,
Thank you for you reply and answering my first question
Sorry about the lack of info

I have attached the cruedist diagram just to give a visual

Blue - window
Red - couch
Green - door

Purple - table
Yellow - monitors
Cyan - sub

Room dimensions

The back right hand corner loses few feet
due to wall being built inwards

L430cm W259cm H241cm

176cm from front wall sweet spot

Monitors are a 42cm from side walls and 70cm from front wall

5" monitors
8" sub

I hope this helps
Please let me know if I have missed any other important information

Recently looking at membrane absorber basstrap
By gikacoustic t40 t70 t100
Maybe this would help I have no idea I'm really lost trying to piece all this together

Thank you in advance
Attached Thumbnails
250hz and down foam treatment-screenshot_20190722-045413_chrome.jpg  

Last edited by ayseeare; 22nd July 2019 at 05:30 AM.. Reason: Other info
Old 22nd July 2019
  #4
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Quote:
Originally Posted by ayseeare View Post
Hej bushman,
Thank you for you reply and answering my first question
Sorry about the lack of info

I have attached the cruedist diagram just to give a visual

Blue - window
Red - couch
Green - door

Purple - table
Yellow - monitors
Cyan - sub

Room dimensions

The back right hand corner loses few feet
due to wall being built inwards

L430cm W259cm H241cm

176cm from front wall sweet spot

Monitors are a 42cm from side walls and 70cm from front wall

5" monitors
8" sub

I hope this helps
Please let me know if I have missed any other important information

Recently looking at membrane absorber basstrap
By gikacoustic t40 t70 t100
Maybe this would help I have no idea I'm really lost trying to piece all this together

Thank you in advance
I’m short on time right now. Brief reply... I looked into membrane traps for my room and communicated with GIK about them. You should communicate with them. It takes a number of membrane traps to be effective. The cost and shipping add up quickly.
Most important! Are you using REW? You can’t fix your room, particularly at low frequencies, without a clear reading of problems and results. GIK will tell you the same, I think.
Your orientation looks correct to me, with the window behind the speakers and the listening position facing the symmetrical part of the room.
Old 25th July 2019
  #5
Here for the gear
 

Quote:
Originally Posted by Bushman View Post
I’m short on time right now. Brief reply... I looked into membrane traps for my room and communicated with GIK about them. You should communicate with them. It takes a number of membrane traps to be effective. The cost and shipping add up quickly.
Most important! Are you using REW? You can’t fix your room, particularly at low frequencies, without a clear reading of problems and results. GIK will tell you the same, I think.
Your orientation looks correct to me, with the window behind the speakers and the listening position facing the symmetrical part of the room.
Hi Bushman
I will have to chat with them thanks for advice
A number of membrane traps I see hmm ok

Yes I have REW but just an uncalibrated ecm8000 mic
Been using the genral calibration file

I will have to sort out calibrated mic at some point

Thanks for reply again Bushman
Let me know how you get on your end
And I will keep you updated here

Enjoy your day
Old 3rd August 2019
  #6
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AudioWonderland's Avatar
 

I built a 6' tall, 4' wide, 18" deep chunk on the back wall of my 11'x9' control room to do this. In theory it should reach down to ~ 43hz if memory serves
Old 19th August 2019
  #7
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Starlight's Avatar
 

A 30cm thick trap will trap 100% of frequencies down to 1.143kHz and less than 100% the further the frequency drops, down to 0% effect at 558Hz and lower.
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