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Coherence based reflection coefficient estimation

Goudarzi, Armin (2020) Coherence based reflection coefficient estimation. In: DAGA2020 Tagungsband (225), 68 - 71. DAGA 2020 – 46. Deutsche Jahrestagung für Akustik, 2020-03-16 - 2020-03-19, Hannover, Germany.

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Official URL: https://daga2020.de


A new method to measure the reflection coefficient of surfaces is presented. It only relies on a single noise source and a single microphone. The method is robust to inaccuracies in the experimental setup and does not require high end measurement equipment. It is derived from the blind source separation problem where the direct and reflected sound are reconstructed from their mixed signal. To do so, an analytical solution to the mixing matrix is presented. It is based on a short window Welch coherence estimation of the measured signal and a by the reflection time shifted version of the signal. The method is validated with simulated and real experimental data.

Item URL in elib:https://elib.dlr.de/135731/
Document Type:Conference or Workshop Item (Speech)
Additional Information:Akustische Messtechnik und Sensorik 2, Veranstalter: • Deutsche Gesellschaft für Akustik e.V. (DEGA) • Leibniz Universität Hannover – Institut für Kommunikationstechnik (LUH/IKT) • Niedersächsische Arbeitsgemeinschaft Akustik (NAGA) unter Mitwirkung von • Deutsche Physikalische Gesellschaft (DPG) • DIN/VDI-Normenausschuss NALS • Informationstechnische Gesellschaft (ITG) im VDE
Title:Coherence based reflection coefficient estimation
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Goudarzi, ArminUNSPECIFIEDhttps://orcid.org/0000-0002-2437-028XUNSPECIFIED
Journal or Publication Title:DAGA2020 Tagungsband
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Page Range:68 - 71
Series Name:Conference Proceedings
Keywords:reflection coefficient estimation, single microphone, measurement equipment, blind source separation
Event Title:DAGA 2020 – 46. Deutsche Jahrestagung für Akustik
Event Location:Hannover, Germany
Event Type:international Conference
Event Start Date:16 March 2020
Event End Date:19 March 2020
Organizer:German Acoustical Society (DEGA e.V.), siehe Anhang
Institution:Deutsches Zentrum für Luft- und Raumfahrt e.V.
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation (old)
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Experimental Methods, GO
Deposited By: Micknaus, Ilka
Deposited On:18 Sep 2020 12:40
Last Modified:24 Apr 2024 20:38

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