Is it advantageous to apply a sound diffusing material inside a box? - diyAudio
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Old 17th June 2007, 12:37 AM   #1
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Default Is it advantageous to apply a sound diffusing material inside a box?

Next month, after I move, I think I want to try a small NS3-193 full range project. I was going to make pill shaped enclosures and mount them to the wall. The shape is basically a box, but with a curved top and bottom. Internal dimensions will be 6.5"h x 4.5"w x 4"d. Now my question is this. I can get a can of textured spray paint for under $5. This applied to the inside of a box creates a bumpy surface. Would this help prevent reflections at all? The sides and the front/back of my enclosure are parallel. The top and bottom being arcs.
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Old 17th June 2007, 03:50 AM   #2
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Default Re: Is it advantageous to apply a sound diffusing material inside a box?

Quote:
Originally posted by GuyPanico
This applied to the inside of a box creates a bumpy surface. Would this help prevent reflections at all?
Probably not enuff to make a difference... Things like this are effective on the order of there size.

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Old 17th June 2007, 04:03 AM   #3
OzMikeH is offline OzMikeH  Australia
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I have seen someone glue pebbles to the back of a driver as a diffuser.
washed angular rocks might be good inside your cabinet. I have no idea what glue to use.
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Old 17th June 2007, 12:32 PM   #4
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Since the enclosure will be constructed out of several CNC'd rings, I can easily make the side walls into a random ~1/8" long sawtooth texture. This would definantly create a true nonflat/nonparallel surface. And then I could mill a pyramid texture on the back panel. Would this be resonably effective in destroying standing waves and resonance?
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Old 17th June 2007, 11:36 PM   #5
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Quote:
Originally posted by GuyPanico
Would this be resonably effective in destroying standing waves and resonance?
The features have an effect on the order of their size.... unless substantial they will only blur any staanding waves or resonances... on the other hand if the angle is acute enuff, it will have a scattering effect at higher frequencies.

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