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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Thank you posted by AudioDwebe on May 26, 2010 at 14:28:04:
"I never realized that you're not supposed to use these, along with acoustic treatment."
I don't think it's that, exactly. You certainly can use them along with other acoustic treatments but the question becomes one of placement. They use reflections on wall surfaces to help achieve diffusion so placing absorption where they need the room surface for reflection works against them.
I suspect a major reason why they tend to be used without other acoustic treatments is that they don't look like the average acoustic treatment product and I suspect more than a few people who couldn't, or didn't want to, use normal acoustic treatment products went for the room lens because it took up less floor space than other treatment products and didn't look as bad in a living room. They're also light and easy to move so they could be moved into place for a listening session and removed afterwards quickly and easily.
I seem to remember that their advertising made a big deal of the fact that they absorbed bass frequencies by their action as a Helmholtz resonater, and also worked as a diffuser, so they tended to be pushed as a single treatment strategy that did everything. I think the bass absorption was not particularly great and they certainly were incapable of replacing a good set of bass traps. For their size, however, I think they did a reasonable job of diffusion. They have no absorption whatsoever at higher frequencies however.
Why did I remove them? I first built them when I was in my previous home with an awkward room, couldn't use any other sort of treatment because it was a very small living room. They helped a lot there but the room was basically rectangular, was reasonably reflective, and less problematic than the L-shaped room I acquired when I moved house. It wasn't easy to find effective placements for them in the new room and one of the major problems with the new room was that the shape of it strengthened the reflections from one side, pulling the centre image to that side quite noticeably. In the end I found it easier to get better results using absorption and the best placement for the room lens units ended up being where I needed to put a sofa so in the end absorption and furniture won out over the lenses in the new room.
David Aiken
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- RE: Thank you - David Aiken 18:53:30 05/26/10 (0)
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