title: Comparison between parallel transfer matrix method and admittance sum method.
abstract: A transfer matrix method to predict absorption coefficient and transmission loss of parallel assemblies of materials which can be expressed by a 2 × 2 transfer matrix was published recently. However, the usual method based on the sum of admittances is largely used to predict also surface admittance of parallel assemblies. This paper aims to highlight differences between both methods through three examples on a parallel assembly backed by (1) a rigid wall, (2) an air cavity, and (3) an anechoic termination.
authors.affiliation: GAUS, Department of Mechanical Engineering, Université de Sherbrooke (Qc), J1K 2R1, Canada Kevin.Verdiere@USherbrooke.ca, Raymond.Panneton@USherbrooke.ca, Said.Elkoun@USherbrooke.ca.
authors.forename: Kévin
authors.initials: K
authors.lastname: Verdière
authors.affiliation: GAUS, Department of Mechanical Engineering, Université de Sherbrooke (Qc), J1K 2R1, Canada Kevin.Verdiere@USherbrooke.ca, Raymond.Panneton@USherbrooke.ca, Said.Elkoun@USherbrooke.ca.
authors.forename: Raymond
authors.initials: R
authors.lastname: Panneton
authors.affiliation: GAUS, Department of Mechanical Engineering, Université de Sherbrooke (Qc), J1K 2R1, Canada Kevin.Verdiere@USherbrooke.ca, Raymond.Panneton@USherbrooke.ca, Said.Elkoun@USherbrooke.ca.
authors.forename: Saïd
authors.initials: S
authors.lastname: Elkoun
authors.affiliation: DRIVE, ISAT, Université de Bourgogne, 49 Rue Mademoiselle Bourgeois, 58027 Nevers Cedex, France Thomas.Dupont@u-bourgogne.fr, Philippe.Leclaire_isat@u-bourgogne.fr.
authors.forename: Thomas
authors.initials: T
authors.lastname: Dupont
authors.affiliation: DRIVE, ISAT, Université de Bourgogne, 49 Rue Mademoiselle Bourgeois, 58027 Nevers Cedex, France Thomas.Dupont@u-bourgogne.fr, Philippe.Leclaire_isat@u-bourgogne.fr.
authors.forename: Philippe
authors.initials: P
authors.lastname: Leclaire