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Quote:
Originally Posted by jmhc /forum/post/18115367


Hello there:


Does anybody know if I can use egg cartons as a cheap sustitute for sound diffusors. From 1 to 5 how wolud you qualify the diffusion performance??


Thank you.

No, you can't. I'd rate them at 0, no kidding. Even CD's, records or books on a bookshelf would work much better, and that's not saying much.


Frank
 

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Discussion Starter · #3 ·

Quote:
Originally Posted by Weasel9992 /forum/post/18115476


No, you can't. I'd rate them at 0, no kidding. Even CD's, records or books on a bookshelf would work much better, and that's not saying much.


Frank

Thank you Frank for the reply, I considered the egg cartons because I saw on the internet sound diffusor panels with a very similar shape.


Anyway, if not much trouble, can you tell me what cause the poor diffusing performance, if it is in the shape or it is in the material that they are made of.


Regards.
 

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Quote:
Originally Posted by jmhc /forum/post/18117111


Thank you Frank for the reply, I considered the egg cartons because I saw on the internet sound diffusor panels with a very similar shape.


Anyway, if not much trouble, can you tell me what cause the poor diffusing performance, if it is in the shape or it is in the material that they are made of.


Regards.

Well, both really. They're too soft, and given their density they absorb along a very narrow bandwidth...if you have an 800Hz problem in your room they're perfect.
The other issue is the fact the fact that you'll always have a repeating patter no matter how you orient them. That's real bad when it comes to diffusion.


Frank
 

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Quote:
Originally Posted by jmhc /forum/post/18117111


can you tell me what cause the poor diffusing performance, if it is in the shape or it is in the material that they are made of.

Besides the spot-on advice you got from Frank, this video demonstrates a lot of what you are asking:

All About Diffusion


--Ethan
 

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Discussion Starter · #6 ·

Quote:
Originally Posted by Weasel9992 /forum/post/18117255


Well, both really. They're too soft, and given their density they absorb along a very narrow bandwidth...if you have an 800Hz problem in your room they're perfect.
The other issue is the fact the fact that you'll always have a repeating patter no matter how you orient them. That's real bad when it comes to diffusion.


Frank
Quote:
Originally Posted by Ethan Winer /forum/post/18117513


Besides the spot-on advice you got from Frank, this video demonstrates a lot of what you are asking:

All About Diffusion


--Ethan


Thank you guys for the help, I guess I'll look for something else to diffuse. Ethan I'll check the video later when my internet signal gets better.


Quote:
Originally Posted by Weasel9992 /forum/post/18115476


CD's, records or books on a bookshelf would work much better


Frank, is there a specific rule that I have to be aware of in order to use CD or books on a bookshelf as diffusors?? or I just have to put them in a odd way??
 

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Microfiber furniture...



Really he is not saying to use books on a bookshelf.


Even relatively simple bass traps should be at least in the relhm of a proper design.



Can you tell us what you are really attempting to accomplish here?
 

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Discussion Starter · #8 ·

Quote:
Originally Posted by JOHNnDENVER /forum/post/18118096


Microfiber furniture...



Really he is not saying to use books on a bookshelf.


Even relatively simple bass traps should be at least in the relhm of a proper design.



Can you tell us what you are really attempting to accomplish here?

My seating position is to close to the back wall (it is so close that I didn't even consider a 7.1 system) and I thought diffusing the sound reflected from that wall could give me better sound.


I'm also planning to use bass traps in all the room corners.
 

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Quote:
Originally Posted by JOHNnDENVER /forum/post/18118096


Really he is not saying to use books on a bookshelf.

Right, thanks for clarifying that. Diffusion is more than just random patterns. the width and depth of each well is precisely specified based on what we want to accomplish. You're usually better off concentrating on absorption as a first step at least, then once the room is more controlled you can take a longer look at diffusion.


Frank
 

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Discussion Starter · #12 ·

Quote:
Originally Posted by Weasel9992 /forum/post/18121946


You're usually better off concentrating on absorption as a first step at least, then once the room is more controlled you can take a longer look at diffusion.


Frank

Frank, I'm planning to cover the 4 walls of the room with 1/2 inch couch foam and heavy cloth, will that be a good starting point??.
 

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Quote:
Originally Posted by jmhc /forum/post/18122077


Frank, I'm planning to cover the 4 walls of the room with 1/2 inch couch foam and heavey cloth, will that be a good starting point??.

NO. Don't do that. You'll over absorb the highs and do absolutely nothing for the lows, so the room will be dry and boomy. Not good.


Can you post a diagram of the room so we can take a look at what you have to work with?


Frank
 

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Discussion Starter · #14 ·

Quote:
Originally Posted by Weasel9992 /forum/post/18122234


NO. Don't do that. You'll over absorb the highs and do absolutely nothing for the lows, so the room will be dry and boomy. Not good.


Can you post a diagram of the room so we can take a look at what you have to work with?


Frank

Sure, I have one at home, I'll post it tonight.
 

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Discussion Starter · #15 ·

Quote:
Originally Posted by Weasel9992 /forum/post/18122234


NO. Don't do that. You'll over absorb the highs and do absolutely nothing for the lows, so the room will be dry and boomy. Not good.


Can you post a diagram of the room so we can take a look at what you have to work with?


Frank

Frank I couldn't upload the picture last night, I'll se if I can do it today.


I asked a friend to let me demo his theater which has the 4 walls covered with couch foam and heavy cloth and floor and ceiling uncovered, man you were absolutely right the place sounds really dead, thank you for the advice.
 

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I'd start simply since it sounds like you want a more lively environment: bass trapping in the front corners, 2" panels at the reflection points and thicker, 6" bass traps (2) on the back wall. If you can't fit 6" traps, go with 4". You can always add more absorption if you think you need it. That's just a starting place.


Frank
 

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Discussion Starter · #18 ·

Quote:
Originally Posted by Weasel9992 /forum/post/18128787


I'd start simply since it sounds like you want a more lively environment: bass trapping in the front corners, 2" panels at the reflection points and thicker, 6" bass traps (2) on the back wall. If you can't fit 6" traps, go with 4". You can always add more absorption if you think you need it. That's just a starting place.


Frank

Frank what about the floor, it is 100% reflective, do you think it will be good if I cover the entire floor with a carpet??
 

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Quote:
Originally Posted by jmhc /forum/post/18131960


Frank what about the floor, it is 100% reflective, do you think it will be good if I cover the entire floor with a carpet??

Eh..not the whole floor, unless wall-to-wall carpet is what you want from an aesthetic standpoint. A 5'x8' area rug or two and some experimentation in terms of placement will do nicely.


Frank
 

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Discussion Starter · #20 ·

Quote:
Originally Posted by Weasel9992 /forum/post/18134283


Eh..not the whole floor, unless wall-to-wall carpet is what you want from an aesthetic standpoint. A 5'x8' area rug or two and some experimentation in terms of placement will do nicely.


Frank

Frank, thank you very much for the help, and thank you to John ans Ethan too.
 
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