A measurement method for the estimation of the absorption characteristics of finite-sized porous absorbers

Firtha, Gergely and Fiala, Péter (2023) A measurement method for the estimation of the absorption characteristics of finite-sized porous absorbers. Journal of Physics: Conference Series, 2677. pp. 1-13. ISSN 1742-6588

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Abstract

The estimation of sound field generated inside enclosures has gained increasing interest in the recent years, both for acoustic design purposes and virtual reality applications. Numerical simulation methods require detailed information on the impedance/absorption characteristics of the enclosing surfaces. The present measurement methods are only capable of obtaning the point-like impedance of locally reacting surfaces. We present a new measurement technique to characterize extended reacting absorbing surfaces. The measurement is done by scanning the surface with a PU-probe, and the asborption characteristics are obtained by a Helmholtz-integral based postprocessing step.

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