Spherical sound sources localization using SONAH

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Spherical sound sources localization using SONAH

Popis výsledku v původním jazyce

Near Field Acoustical Holography (NAH) is a practical tool for noise source identification and sound field visualization. Statistically Optimized Near Field Acoustical Holography (SONAH) is developed in recent years due to its patch reconstruction ability, enabling smaller measurement aperture and shorter measurement time. In this paper, SONAH is adopted to localize the spherical sound sources positions. Firstly, three spherical sound sources are placed at the baffled source plane. Then, the sound pressure at the holographic plane is synthesized using the spherical sound sources propagation formula. After that, the synthesized pressure data are used as input to SONAH to localize all sources positions. Truncated singular value decomposition (TSVD) regularization is utilized in the SONAH reconstruction process to stabilize the solution. The SONAH reconstruction results are compared with the synthesized pressure very close to the source plane using the same spherical sound sources propagation formula. The comparison demonstrates accurate localization capability of SONAH algorithm. In addition, the difference between the reconstruction pressure amplitude by SONAH and the synthesized pressure by the spherical sound sources propagation formula is also discussed in this study.

Název v anglickém jazyce

Spherical sound sources localization using SONAH

Popis výsledku anglicky

Near Field Acoustical Holography (NAH) is a practical tool for noise source identification and sound field visualization. Statistically Optimized Near Field Acoustical Holography (SONAH) is developed in recent years due to its patch reconstruction ability, enabling smaller measurement aperture and shorter measurement time. In this paper, SONAH is adopted to localize the spherical sound sources positions. Firstly, three spherical sound sources are placed at the baffled source plane. Then, the sound pressure at the holographic plane is synthesized using the spherical sound sources propagation formula. After that, the synthesized pressure data are used as input to SONAH to localize all sources positions. Truncated singular value decomposition (TSVD) regularization is utilized in the SONAH reconstruction process to stabilize the solution. The SONAH reconstruction results are compared with the synthesized pressure very close to the source plane using the same spherical sound sources propagation formula. The comparison demonstrates accurate localization capability of SONAH algorithm. In addition, the difference between the reconstruction pressure amplitude by SONAH and the synthesized pressure by the spherical sound sources propagation formula is also discussed in this study.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10307 - Acoustics

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the Inter-Noise 2018

ISBN

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ISSN

0736-2935

e-ISSN

0736-2935

Počet stran výsledku

10

Strana od-do

1-10

Název nakladatele

Institute of Noise Control Engineering of the USA

Místo vydání

Washington, DC

Místo konání akce

Chicago

Datum konání akce

26. 8. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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