title: Acoustic beamforming through a thin plate using vibration measurements.
abstract: The aim of this paper is to propose a methodology to localize acoustic sources from the measurement of airborne induced vibrations of a thin structure. Targeted applications are the identification of acoustic sources through a thin wall, with a potential filtration of the incident field, which may be of practical interest, for instance, when identifying exterior acoustic sources from the inside of a moving vehicle. Two methods are coupled here to achieve this purpose: the Force Analysis Technique (FAT), used to identify the parietal pressure field exciting the thin structure from vibration measurements, and beamforming, used for the localization of acoustic sources from the (FAT-)identified parietal pressure. The coupling of the two methods is studied first from a theoretical point of view, and an experimental proof of concept is then presented, showing the feasibility and relevance of the proposed approach.
authors.affiliation: Laboratoire Vibrations Acoustique, Institut National des Sciences Appliquées, Lyon F-69621, France.
authors.forename: Quentin
authors.initials: Q
authors.lastname: Leclère
authors.affiliation: MicrodB, Ecully 69130, France.
authors.forename: Christophe
authors.initials: C
authors.lastname: Picard