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Locating primary sound sources in scattering media using multifrequency digital holographic reconstruction
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0003-4879-8261
HTW, Hochschule für Technik und Wirtschaft, Dresden.
2006 (English)In: Optical Engineering: The Journal of SPIE, ISSN 0091-3286, E-ISSN 1560-2303, Vol. 45, no 1Article in journal (Refereed) Published
Abstract [en]

Multifrequency digital holographic reconstructions of primary sound sources embedded in scattering media are demonstrated. The sound field is measured with a scanning laser Doppler vibrometer (LDV) and broadening of the spectral content of the sound source is achieved by tuning the primary ultrasound (US) transducer around its resonance frequency. The results show that combining the complex amplitudes from the different frequency reconstructions results in a reduced susceptibility to multiple scattered sound and makes possible a quite thorough localization of the primary sound source. The depth resolution obtained is 11 US frequencies. This depth sensitivity is improved even further to only 2.8 wavelengths by applying a filter determined from the standard deviation over the phases

Place, publisher, year, edition, pages
2006. Vol. 45, no 1
National Category
Applied Mechanics
Research subject
Experimental Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-3092DOI: 10.1117/1.2162032ISI: 000235481400026Scopus ID: 2-s2.0-33748589244Local ID: 0e040bf0-6f73-11db-962b-000ea68e967bOAI: oai:DiVA.org:ltu-3092DiVA, id: diva2:975948
Note
Validerad; 2006; Bibliografisk uppgift: Paper id:: 015801; 20060925 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Olsson, ErikSjödahl, Mikael

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