3D sound radiation reconstruction from camera measurements

Baldini, Sofia (author), Guernieri, Gianluca (author), Gorjup, Domen (author), Gardonio, Paolo (author), Slavič, Janko (author), Rinaldo, Roberto (author)

In general, the measurement of the sound radiation field by machinery and partitions requires time-consuming tests, which should be carried out in specially dedicated anechoic/reverberant facilities with calibrated sensors and complex acquisition and post processing equipment. This article introduces a two-step method for the identification from optical measurements of the free- field sound radiation generated by flexural vibrations of closed shells. In the first step, the flexural vibration of the shell is reconstructed with a frequency domain triangulation technique based on short multi-view video acquisitions made with a single high-resolution, high-speed camera. In the second step, the free-field sound radiation is derived from a discretized boundary integral formulation. The study is focused on the identification of the sound radiation from the flexural vibration of a baffled cylinder model structure. The vibration and sound fields reconstructed from the camera measurements are validated against direct measurements taken with a laser scanner vibrometer and a microphone array, respectively. Overall, this research demonstrates that optical methods based on camera measurements can be suitably employed to produce fast and accurate full-field measurements of sound radiation of closed shells (without the need for a dedicated measurement environment, e.g. reverberant, anechoic chambers).

• Language: English
• Keywords: videogrammetry, flexural vibration measurement, sound radiation reconstruction, frequency-domain triangulation
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2025
• Number of pages: 20 str.
• Numbering: Vol. 227, art. 112400
• PID: 20.500.12556/RUL-167086
• UDC: 534.83
• ISSN on article: 1096-1216
• DOI: 10.1016/j.ymssp.2025.112400
• COBISS.SI-ID: 225020931

Copyright

Podatek o licenci je pridobjen s strani avtorja in objavljen na založnikovi spletni strani.

• Publication date in RUL: 07.02.2025

Record is a part of a journal

• Title: Mechanical systems and signal processing
• Shortened title: Mech. syst. signal process.
• Publisher: Elsevier
• ISSN: 1096-1216
• COBISS.SI-ID: 15296283

Licences

• License: CC BY-ND 4.0, Creative Commons Attribution-NoDerivatives 4.0 International
• Link: http://creativecommons.org/licenses/by-nd/4.0/
• Description: Under the NoDerivatives Creative Commons license one can take a work released under this license and re-distribute it, but it cannot be shared with others in adapted form, and credit must be provided to the author.

Secondary language

• Language: Slovenian
• Keywords: videogrametrija, merjenje vibracij, zvočno sevanje, triangulacija v frekvenčni domeni

Projects

• Funder: Other - Other funder or multiple funders
• Funding programme: University of Udine Research Programme
• Name: ESPERT project

• Funder: ARIS - Slovenian Research and Innovation Agency
• Project number: P2-0263
• Name: Mehanika v tehniki