eprintid: 225381
rev_number: 12
eprint_status: archive
userid: 12270
dir: disk0/00/22/53/81
datestamp: 2025-09-25 13:14:23
lastmod: 2025-09-25 13:14:24
status_changed: 2025-09-25 13:14:23
type: article
metadata_visibility: show
creators_name: Firtha, Gergely
creators_name: Huszty, Csaba
creators_id: firtha@hit.bme.hu
creators_id: huszty.csaba@entel.hu
title: Measurement Based Absorption Characteristics Estimation of Extended Reactive Surfaces
ispublished: pub
subjects: Q1
full_text_status: public
keywords: non-locally reacting, absorption measurement, admittance measurement
abstract: The measurement of surface impedance and the absorption/transmission characteristics is well-established for acoustic materials that can be considered locally reactive: Impedance tube-based and in-situ measurement techniques are codified in multiple ISO standards. However, as lateral wave propagation in the material under test becomes significant, locally reactive assumptions fail and the standardized measurement methods become infeasible. The present contribution discusses the measurement of extendedly reactive surfaces by estimating its distributed surface impedance function and
the consequent numerical prediction of the reflected sound field in a simple planar geometry. The model is validated via the measurement of a resonant panel absorber. Finally, the extension of the absorption coefficient for extended reactive surfaces is discussed.
date: 2023
date_type: published
publication: Forum Acusticum 2023: Proceedings of the 10th Convention of the European Acoustics Association
publisher: Associazione Italiana di Acustica
pagerange: 4971-4978
refereed: TRUE
issn: 2221-3767
funders: Bolyai János Kutatási Ösztöndíj
funders: OTKA PD-143129
funders: ÚNKP-22-5-BME-318
fp7_project: no
fp7_type: info:eu-repo/semantics/article
citation:   Firtha, Gergely and Huszty, Csaba  (2023) Measurement Based Absorption Characteristics Estimation of Extended Reactive Surfaces.  Forum Acusticum 2023: Proceedings of the 10th Convention of the European Acoustics Association.  pp. 4971-4978.  ISSN 2221-3767     
document_url: https://real.mtak.hu/225381/1/FA_2023_Extended_Reactivity_1-1.pdf