Reproducibility experiments on measuring acoustical properties of rigid-frame porous media (round-robin tests).
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.
Horoshenkov
Kirill V
KV
School of Engineering, Design and Technology, University of Bradford, Bradford, United Kingdom. k.horoshenkov@bradford.ac.uk
Khan
Amir
A
Bécot
François-Xavier
FX
Jaouen
Luc
L
Sgard
Franck
F
Renault
Amélie
A
Amirouche
Nesrine
N
Pompoli
Francesco
F
Prodi
Nicola
N
Bonfiglio
Paolo
P
Pispola
Giulio
G
Asdrubali
Francesco
F
Hübelt
Jörn
J
Atalla
Noureddine
N
Amédin
Celse K
CK
Lauriks
Walter
W
Boeckx
Laurens
L
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
C009753:fiberglass; D012408:Rubber