Spherical sound sources localization using SONAH

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F18%3A00324542" target="_blank" >RIV/68407700:21230/18:00324542 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Spherical sound sources localization using SONAH
Original language description
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.
Czech name
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Czech description
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Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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