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Audio and Video Talk
Acoustics & Room Treatment
Great info on porous absorption from John Brandt
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<blockquote data-quote="Timber_MG" data-source="post: 1129399" data-attributes="member: 18"><p>If you look at Rockwool for example, the flow resistivity at a given density can differ by up to about an order of magnitude by what I've tested (no traceability, for my own sake only using half space tests). Fiber glass is far more consistent, better to inhale too but both require a cloth membrane to reduce fibers floating around. Resistive absorption is not an exact art, it's an iterative solution.</p><p></p><p>I wonder whether one could do a static flow resistivity measurement with a manometer and a servo controlled pump.</p></blockquote><p></p>
[QUOTE="Timber_MG, post: 1129399, member: 18"] If you look at Rockwool for example, the flow resistivity at a given density can differ by up to about an order of magnitude by what I've tested (no traceability, for my own sake only using half space tests). Fiber glass is far more consistent, better to inhale too but both require a cloth membrane to reduce fibers floating around. Resistive absorption is not an exact art, it's an iterative solution. I wonder whether one could do a static flow resistivity measurement with a manometer and a servo controlled pump. [/QUOTE]
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Audio and Video Talk
Acoustics & Room Treatment
Great info on porous absorption from John Brandt
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