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Multi-Way Conventional loudspeakers with crossovers

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Old 6th March 2004, 06:00 AM   #1
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Join Date: Feb 2004
Location: US
Default sound absorption ratings

Does someone know where one can find data on the absorption properties of various materials vs. frequency? I'm really looking for something more than impressions of sound improvement as I don't have the money to spend trying all the materials to make my own. NRC ratings (which test at 250, 500, 1000, 2000Hz) would be ok. I'd like to know better what material to apply where when filling my box. If someone has absorption coefficients for commonly used materials like Blackhole or Acousta-Stuff that would also be great.
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