title: Evaluation of surface acoustic waves on the human skin using quasi-time-averaged digital Fresnel holograms.
abstract: This paper proposes a first attempt to visualize and analyze the vibrations induced by a bone-conduction device and propagating at the surface of the skin of a human face. The method is based on a new approach in a so-called quasi-time-averaging regime, resulting in the retrieval of the vibration amplitude and phase from a sequence of digital Fresnel holograms recorded with a high image rate. The design of the algorithm depends on the ratio between the exposure time and the vibration period. The results show the propagation of vibrations at the skin surface, and quantitative analysis is achieved by the proposed approach.
authors.affiliation: l’Université Nantes Angers Le Mans, Université du Maine, CNRS UMR 6613, Laboratoire d’Acoustique de l’Université du Maine, Avenue Olivier Messiaen, Le Mans Cedex 9 72085, France.
authors.forename: Mathieu
authors.initials: M
authors.lastname: Leclercq
authors.forename: Mayssa
authors.initials: M
authors.lastname: Karray
authors.forename: Vincent
authors.initials: V
authors.lastname: Isnard
authors.forename: François
authors.initials: F
authors.lastname: Gautier
authors.forename: Pascal
authors.initials: P
authors.lastname: Picart
mesh_terms: D055119:Elastic Modulus / Q000502:physiology; D054459:Elasticity Imaging Techniques / Q000379:methods*; D006696:Holography / Q000379:methods*; D006801:Humans; D012031:Refractometry / Q000379:methods*; D012815:Signal Processing, Computer-Assisted; D012867:Skin / Q000166:cytology; D012879:Skin Physiological Phenomena / Q000528:radiation effects*; D013016:Sound