title: Sound pressure around dipole source above porous surface.
abstract: A technique for in situ measurements of acoustic properties of a fibrous porous material is proposed in this paper. Proposed technique exploits a directivity pattern of a dipole source in its very near field. Theoretical analysis for the proposed technique is based on the Rayleigh integral with a complex reflection included. Results are compared with results of FEM analysis and show that flow resistivity of a porous material placed in the very near field of the dipole source has significant influence on the sound pressure at its ring. Results provide an excellent starting point for the design of the sensor for sound absorption.
authors.affiliation: University of Ljubljana, Askerceva 6, 1000 Ljubljana, Slovenia prezelj.jurij@gmail.com, peter.steblaj@fs.uni-lj.si, mirko.cudina@fs.uni-lj.si.
authors.forename: Jurij
authors.initials: J
authors.lastname: Prezelj
authors.affiliation: University of Ljubljana, Askerceva 6, 1000 Ljubljana, Slovenia prezelj.jurij@gmail.com, peter.steblaj@fs.uni-lj.si, mirko.cudina@fs.uni-lj.si.
authors.forename: Peter
authors.initials: P
authors.lastname: Steblaj
authors.affiliation: University of Ljubljana, Askerceva 6, 1000 Ljubljana, Slovenia prezelj.jurij@gmail.com, peter.steblaj@fs.uni-lj.si, mirko.cudina@fs.uni-lj.si.
authors.forename: Mirko
authors.initials: M
authors.lastname: Cudina