An experimental approach for estimating the impedance of elastic non-porous materials

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Human skin is generally assumed to be acoustically rigid. It has been shown that it almost totally reflects sound
waves, without significant dissipation of energy. Yet, it appears that the propagation of sound around the human
body is influenced by the acoustic properties of skin tissue (this is for example observed in the simulation of
head-related transfer functions or in ear-canal reflectance measurements). In general, estimating the impedance
of highly reflective materials is experimentally challenging. In this work, the feasibility of the impedance
estimation of nearly acoustically rigid bodies via the equivalent source method is assessed. A semi-analytical
solution to the problem of scattering of sound by an elastic body with a rigid core is derived. The solution of
this problem is used as a validation benchmark for the proposed impedance estimation method. Experimental
tests with real data are also presented and compared against the model result.
Original languageEnglish
Title of host publicationProceedings of EuroNoise 2021
Number of pages10
Publication date2022
Publication statusPublished - 2022
EventEuroNoise 2021 - Online event, Madeira, Portugal
Duration: 25 Oct 202127 Oct 2021


ConferenceEuroNoise 2021
LocationOnline event
Internet address


  • Human skin
  • Impedance estimation
  • ESM
  • Scattering


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