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Interesting THX article on ExtremeTech...

Discussion in 'Home Cinema Buying & Building' started by dvdsubtitles, May 4, 2005.

  1. dvdsubtitles

    dvdsubtitles
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  2. mattym

    mattym
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    Absorption and Diffusion...... :smashin:
     
  3. eviljohn2

    eviljohn2
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    Excellent spot. :clap:

    Informative, easy to understand and relevant to everyone. :)
     
  4. Killahertz

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    An interesting article. And useful as an introduction to some of the main acoustic principles, as they do a pretty good job of sidelining overtly technical references (notwithstanding loudspeaker dispersion and lobing, which sneaks in towards the end :D ).

    Talking of sneaking in. In terms of further reference i'll have to mention my own article on the subject. It is introductory, but introductory from a technical point of view. Covering first principles, as well as the basic principles behind, and DIY design of, absorption and diffusion treatments. It includes 'Basic Room Modes Calculator' an excel-based spreadsheet that calculates axial room modes, as well as necessary treatment calculations.

    http://www.apsalisbury.dsl.pipex.com/roomtreatment.zip

    Further articles, of varying level, can also be found in the acoustical section of the Audioholics website, including my 'Helmholtz Resonant Absorber'.

    http://www.audioholics.com/techtips/roomacoustics/index.php
     
  5. mattym

    mattym
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    cool articles there also,

    There were a few designs of helmholtz absorbers around a while ago, slotted wood-faced units being the one i remember, i think Topakoustic use a variation on this theme as the main absorption tool for that product, RPG had a version way back in 98, and they now use a helmholtz mount for the flutterfree product
     
  6. mattym

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    Just finished reading your download there Adam, very interesting and informative!
     
  7. Killahertz

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    The slat absorber is quite popular in pro-audio circles. Especially where the chamber is heavily stuffed to widen the absorbent bandwidth. I can't comment on their practical application, but i'm wary of their functionality. Most being rectangular wooden enclosures, there's just too many caveats in the construction. A conventional throated chamber (particularly cylindrical) retains criticality of design and construction, but remove some of the other caveats. Meaning that it is a better proposal on the rare occasion that it may be suggested for domestic DIY use.

    Thank you :)
     
  8. Garfield

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    WOW - now I know why the Bose were so bad .....

    Unfortunately my room is not only rectangular it is also 'L' shaped .... it will have to do as it is.
     

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