1 January 2006 Locating primary sound sources in scattering media using multifrequency digital holographic reconstruction
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Optical Engineering, 45(1), 015801 (2006). doi:10.1117/1.2162032
Abstract
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.
Erik Olsson, Mikael Sjödahl, Lothar Zipser, "Locating primary sound sources in scattering media using multifrequency digital holographic reconstruction," Optical Engineering 45(1), 015801 (1 January 2006). http://dx.doi.org/10.1117/1.2162032
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KEYWORDS
Transducers

Digital holography

Holography

Scattering media

Ultrasonography

Doppler effect

Near field optics

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