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Open doors good absorbers?
Old 28th January 2008
  #1
Gear Maniac
 

Open doors good absorbers?

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Hey,
the pictures shows my new studio room. I only wanna produce and mix. My question is if I should leave the doors in the corners open? Or are the low frequencies reflected from the wall of the other rooms back in my studio room? You know what I mean? Any experiences with that? And if you have some other useful suggestions for my room let me know!

Thanks!
Old 28th January 2008
  #2
Gear Maniac
 

How can I upload fotos here?!
Old 29th January 2008
  #3
Gear Guru
 
Ethan Winer's Avatar
 

Lightbulb

Quote:
Originally Posted by Osten Powers View Post
My question is if I should leave the doors in the corners open?
An open door is the same as a highly effective absorber, assuming what's beyond the door is far enough away to not reflect sound back into the room. In fact, the definition of one sabin of absorption is a window open to the outside one square foot in size.

--Ethan
Old 29th January 2008
  #4
Gear Maniac
 

Here is my room! Room lenght is 15,09 ft the width is 13,12 ft! The speakers are 2,6 ft away from the walls! In the front corners left/right are the doors! These are the doors I wanna leave open! The distance from the doors to the walls of the other rooms is 12 ft! If I have a 50 Hz wave its lenght is 22,5 feet. How much of the energie would come back in my room? Makes it sense to leave the doors open or is it uncontrollable? I'm thinking about that because there is no space for absorbers in the front corners because there are the doors. But I think I have many modal frequencies in my room because it's nearly a square! The room is 9.5 ft high!! Sorry for my bad english!

Thanks!
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Old 31st January 2008
  #5
Gear Guru
 
Ethan Winer's Avatar
 

Lightbulb

Your English is fine.

Most rooms have 12 corners, not 4, so there's 8 more places for bass traps. heh

The only way to answer the rest of your questions is to measure the bass response in your room at high resolution. I use the ETF software for Windows described HERE, but there's also Fuzzmeasure for Macs and Room EQ Wizard for Windows.

--Ethan
Old 2nd February 2008
  #6
Gear Maniac
 

Quote:
Originally Posted by Ethan Winer View Post
Your English is fine.

Most rooms have 12 corners, not 4, so there's 8 more places for bass traps. heh

The only way to answer the rest of your questions is to measure the bass response in your room at high resolution. I use the ETF software for Windows described HERE, but there's also Fuzzmeasure for Macs and Room EQ Wizard for Windows.

--Ethan
Yes I was thinking of measure the impulse response of my room, that's the only way to find out what's going on. I think I will measure it with doors closed/ doors open. So I can see the effect of the open doors to my room. I was thinking of puttin rock whool in the back corners from bottom to top and put some fabric over it. Maybe I'll buy me a couch for my guests I think it's a good absorber too ! Thanks for your help Ethan thumbsup! Let me know if you have some other (cheap) and effective suggestions!
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