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Proceedings Paper

Reconstruction of sound fields using TV holography
Author(s): Ole Johan Lokberg; Rolf Rustad; Morten Espeland
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Paper Abstract

A vibrating sound source causes periodic pressure variations in the air. The pressure variations lead to corresponding variations in the refractive index of the air which can be measured using interferometric techniques like TV- holography. Each measurement maps a cross-section of the integrated sound fields. To obtain a complete map of the volume distribution of sound field we record cross-sections from different directions. Using topographical backprojection of these recordings, we reconstruct the amplitude and phase of the sound field in any plane of the volume.

Paper Details

Date Published: 8 September 1994
PDF: 8 pages
Proc. SPIE 2358, First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (8 September 1994); doi: 10.1117/12.185310
Show Author Affiliations
Ole Johan Lokberg, Norwegian Institute of Technology (Norway)
Rolf Rustad, Norwegian Institute of Technology (Norway)
Morten Espeland, Norwegian Institute of Technology (Norway)


Published in SPIE Proceedings Vol. 2358:
First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
Enrico Primo Tomasini, Editor(s)

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