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Audio and Video Talk
Acoustics & Room Treatment
Broadband absorber - porous for small rooms, membrane for bigger?
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<blockquote data-quote="Atjan" data-source="post: 209667" data-attributes="member: 2323"><p>Found on www.soundonsound.com:</p><p>F=60/ sqrt(md)</p><p></p><p>f -target freq</p><p>m-kg/m2 (of membrane)</p><p>d-depth of box. </p><p></p><p>I decided I can't live with more than 200mm deep and used a 6mm membrane. Did sweet bugger all. So I reckon its too thick.... </p><p></p><p>What I find a bit iffy is that the guy reckons the surface area of the membrane does not impact the target freq. Logic says that a smaller membrane will be stiffer and hence target a much lower freq.</p></blockquote><p></p>
[QUOTE="Atjan, post: 209667, member: 2323"] Found on www.soundonsound.com: F=60/ sqrt(md) f -target freq m-kg/m2 (of membrane) d-depth of box. I decided I can't live with more than 200mm deep and used a 6mm membrane. Did sweet bugger all. So I reckon its too thick.... What I find a bit iffy is that the guy reckons the surface area of the membrane does not impact the target freq. Logic says that a smaller membrane will be stiffer and hence target a much lower freq. [/QUOTE]
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Audio and Video Talk
Acoustics & Room Treatment
Broadband absorber - porous for small rooms, membrane for bigger?
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