Reconstruction of sound fields using TV holography

Ole Johan Lokberg; Rolf Rustad; Morten Espeland

doi:10.1117/12.185310

8 September 1994 Reconstruction of sound fields using TV holography

Ole Johan Lokberg, Rolf Rustad, Morten Espeland

Proceedings Volume 2358, First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (1994) https://doi.org/10.1117/12.185310
Event: Vibration Measurements by Laser Techniques: First International Conference, 1994, Ancona, Italy

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.

Citation Download Citation

Ole Johan Lokberg, Rolf Rustad, and Morten Espeland "Reconstruction of sound fields using TV holography", Proc. SPIE 2358, First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (8 September 1994); https://doi.org/10.1117/12.185310

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