Localization and Categorization of Early Reflections for Estimating Acoustic Reflection Coefficients

Research output: Chapter in book/report/conference proceedingConference contributionResearchpeer review

Authors

  • Robert Hupke
  • Sebastian Lauster
  • Nils Poschadel
  • Marcel Nophut
  • Stephan Preihs
  • Jurgen Peissig
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Details

Original languageEnglish
Title of host publicationIEEE 22nd International Workshop on Multimedia Signal Processing
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (electronic)9781728193205
ISBN (print)9781728193236
Publication statusPublished - 2020
Event22nd IEEE International Workshop on Multimedia Signal Processing, MMSP 2020 - Virtual, Tampere, Finland
Duration: 21 Sept 202024 Sept 2020

Publication series

NameIEEE Workshop on Multimedia Signal Processing
ISSN (Print)2163-3517
ISSN (electronic)2473-3628

Abstract

Knowledge of room acoustic parameters such as frequency- and direction-dependent reflection coefficients, room volume, or geometric characteristics is important for the mod-eling of acoustic environments, e. g. to improve the plausibility of immersive audio in mixed reality applications or to transfer a physical acoustic environment into a completely virtual one. This paper presents a method for detecting first-order reflections in three-dimensions of spatial room impulse responses recorded with a spherical microphone array. By using geometric relations, the estimated direction of arrival (DOA), and the time difference of arrival (TDOA), the order of the respective mirror sound source is determined and categorized to the individual walls of the room. The detected DOA and TDOA of the first-order mirror sound sources are used to estimate the frequency-dependent reflection coefficients of the respective walls using a null-steering beamformer directed to the estimated DOA. Analysis in terms of DOA and TDOA indicates an accurate estimation for simulated and measured data. The estimation of the reflection coefficients shows a relative error of 3.5 % between 500 Hz and 4 kHz for simulated data. Furthermore, experimental challenges are discussed, such as the evaluation of the reflection coefficient estimation in real acoustic environments.

Keywords

    beamforming, image sources, reflection coefficient, Room acoustics, spherical microphone array

ASJC Scopus subject areas

Cite this

Localization and Categorization of Early Reflections for Estimating Acoustic Reflection Coefficients. / Hupke, Robert; Lauster, Sebastian; Poschadel, Nils et al.
IEEE 22nd International Workshop on Multimedia Signal Processing. Institute of Electrical and Electronics Engineers Inc., 2020. 9287099 (IEEE Workshop on Multimedia Signal Processing).

Research output: Chapter in book/report/conference proceedingConference contributionResearchpeer review

Hupke, R, Lauster, S, Poschadel, N, Nophut, M, Preihs, S & Peissig, J 2020, Localization and Categorization of Early Reflections for Estimating Acoustic Reflection Coefficients. in IEEE 22nd International Workshop on Multimedia Signal Processing., 9287099, IEEE Workshop on Multimedia Signal Processing, Institute of Electrical and Electronics Engineers Inc., 22nd IEEE International Workshop on Multimedia Signal Processing, MMSP 2020, Virtual, Tampere, Finland, 21 Sept 2020. https://doi.org/10.1109/MMSP48831.2020.9287099
Hupke, R., Lauster, S., Poschadel, N., Nophut, M., Preihs, S., & Peissig, J. (2020). Localization and Categorization of Early Reflections for Estimating Acoustic Reflection Coefficients. In IEEE 22nd International Workshop on Multimedia Signal Processing Article 9287099 (IEEE Workshop on Multimedia Signal Processing). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/MMSP48831.2020.9287099
Hupke R, Lauster S, Poschadel N, Nophut M, Preihs S, Peissig J. Localization and Categorization of Early Reflections for Estimating Acoustic Reflection Coefficients. In IEEE 22nd International Workshop on Multimedia Signal Processing. Institute of Electrical and Electronics Engineers Inc. 2020. 9287099. (IEEE Workshop on Multimedia Signal Processing). doi: 10.1109/MMSP48831.2020.9287099
Hupke, Robert ; Lauster, Sebastian ; Poschadel, Nils et al. / Localization and Categorization of Early Reflections for Estimating Acoustic Reflection Coefficients. IEEE 22nd International Workshop on Multimedia Signal Processing. Institute of Electrical and Electronics Engineers Inc., 2020. (IEEE Workshop on Multimedia Signal Processing).
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