title: Reproducibility experiments on measuring acoustical properties of rigid-frame porous media (round-robin tests).
abstract: This paper reports the results of reproducibility experiments on the interlaboratory characterization of the acoustical properties of three types of consolidated porous media: granulated porous rubber, reticulated foam, and fiberglass. The measurements are conducted in several independent laboratories in Europe and North America. The studied acoustical characteristics are the surface complex acoustic impedance at normal incidence and plane wave absorption coefficient which are determined using the standard impedance tube method. The paper provides detailed procedures related to sample preparation and installation and it discusses the dispersion in the acoustical material property observed between individual material samples and laboratories. The importance of the boundary conditions, homogeneity of the porous material structure, and stability of the adopted signal processing method are highlighted.
authors.affiliation: School of Engineering, Design and Technology, University of Bradford, Bradford, United Kingdom. k.horoshenkov@bradford.ac.uk
authors.forename: Kirill V
authors.initials: KV
authors.lastname: Horoshenkov
authors.forename: Amir
authors.initials: A
authors.lastname: Khan
authors.forename: François-Xavier
authors.initials: FX
authors.lastname: Bécot
authors.forename: Luc
authors.initials: L
authors.lastname: Jaouen
authors.forename: Franck
authors.initials: F
authors.lastname: Sgard
authors.forename: Amélie
authors.initials: A
authors.lastname: Renault
authors.forename: Nesrine
authors.initials: N
authors.lastname: Amirouche
authors.forename: Francesco
authors.initials: F
authors.lastname: Pompoli
authors.forename: Nicola
authors.initials: N
authors.lastname: Prodi
authors.forename: Paolo
authors.initials: P
authors.lastname: Bonfiglio
authors.forename: Giulio
authors.initials: G
authors.lastname: Pispola
authors.forename: Francesco
authors.initials: F
authors.lastname: Asdrubali
authors.forename: Jörn
authors.initials: J
authors.lastname: Hübelt
authors.forename: Noureddine
authors.initials: N
authors.lastname: Atalla
authors.forename: Celse K
authors.initials: CK
authors.lastname: Amédin
authors.forename: Walter
authors.initials: W
authors.lastname: Lauriks
authors.forename: Laurens
authors.initials: L
authors.lastname: Boeckx
mesh_terms: D000162:Acoustics / Q000295:instrumentation; D017097:Electric Impedance; D005060:Europe; D005898:Glass / Q000737:chemistry; D006801:Humans; D007391:International Cooperation; D007753:Laboratories / Q000592:standards; D008962:Models, Theoretical; D009656:North America; D016062:Porosity; D011786:Quality Control; D015203:Reproducibility of Results; D012107:Research Design; D012408:Rubber / Q000737:chemistry; D012815:Signal Processing, Computer-Assisted; D013018:Sound Spectrography; D013499:Surface Properties
chemical_list: C009753:fiberglass; D012408:Rubber