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On the representation of wavefronts localized in space-time and wavenumber-frequency domains
KTH, School of Engineering Sciences (SCI), Engineering Mechanics, Fluid Mechanics and Engineering Acoustics, Marcus Wallenberg Laboratory MWL.ORCID iD: 0000-0001-5723-9571
Università degli Studi dell’Aquila, Dipartimento di Ingegneria e Scienze dell’Informazione e Matematica.ORCID iD: 0000-0003-2153-9630
2021 (English)In: JASA Express Letters, ISSN 2691-1191, Vol. 1, no 5, p. 054801-, article id 054801Article in journal (Refereed) Published
Abstract [en]

This Letter reports evidence suggesting a representation system for transient waves with band limited spectra, referred to here as localized waves in the space-time and wavenumber-frequency domains. A theoretical analysis with a transient monopole shows that the wavenumber-frequency pressure spectrum is distributed over hyperbolic regions of propagating waves and evanescent waves. An experimental analysis is performed, applying dictionary learning to reverberant sound fields measured with a microphone array in three rooms. The learned components appear to be related by analytical transformations in the spectra, suggesting a partitioning characterized by hyperbolic dispersion curves and multiple directions and times of arrival.

Place, publisher, year, edition, pages
Acoustical Society of America (ASA) , 2021. Vol. 1, no 5, p. 054801-, article id 054801
National Category
Fluid Mechanics and Acoustics Computational Mathematics
Identifiers
URN: urn:nbn:se:kth:diva-294178DOI: 10.1121/10.0004852ISI: 000648565700001PubMedID: 36154111OAI: oai:DiVA.org:kth-294178DiVA, id: diva2:1553888
Funder
Swedish Research Council, 2020-04668
Note

QC 20210525

QC 20210525

Available from: 2021-05-11 Created: 2021-05-11 Last updated: 2024-03-18Bibliographically approved

Open Access in DiVA

fulltext(2042 kB)238 downloads
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Publisher's full textPubMedhttps://asa.scitation.org/doi/10.1121/10.0004852

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Zea, EliasLaudato, Marco

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