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Old 18th February 2008
  #2
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Fantastic! Almost all the time when we (the acoustic people) write about materials and their sound absorption, are really referring to the gas flow resistivity. You have the right numbers! The good news is that absorption is relatively independent of gas flow resistance in the ranges of common materials. 703 has a gas flow resistance of (depending on the phase of the moon when OC publishes data) between 16 000 and 24 000 . The materials you referenced will do fine!

Andre