title: Bayesian inference of the flow resistivity of a sound absorber and the room's influence on the Sabine absorption coefficients.
abstract: A Bayesian analysis is applied to determine the flow resistivity of a porous sample and the influence of the test chamber based on measured Sabine absorption coefficient data. The Sabine absorption coefficient measured in a reverberation chamber according to ISO 354 is influenced by the test chamber significantly, whereas the flow resistivity is a rather reproducible material property, from which the absorptive characteristics can be calculated through reliable models. Using Sabine absorption coefficients measured in 13 European reverberation chambers, the maximum a posteriori and the uncertainty of the flow resistivity and the test chamber's influence are estimated. Inclusion of more than one chamber's absorption data helps the flow resistivity converge towards a reliable value with a standard deviation below 17%.
authors.affiliation: Department of Electrical Engineering, Technical University of Denmark, 2800, Kongens Lyngby, Denmark.
authors.forename: Cheol-Ho
authors.initials: CH
authors.lastname: Jeong
authors.affiliation: Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, South Korea.
authors.forename: Sang-Hyeon
authors.initials: SH
authors.lastname: Choi
authors.affiliation: Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, South Korea.
authors.forename: Ikjin
authors.initials: I
authors.lastname: Lee