Abstract
Recent studies have demonstrated that the acousto-optic effect, that is, the interaction between sound and light, can be used as a means to visualize acoustic fields in the audible frequency range. The changes of density caused by sound waves propagating in air induce phase shifts to a laser beam that travels through the acoustic field. This phenomenon can in practice be captured with a laser Doppler vibrometer (LDV), and the pressure distribution of the acoustic field can be reconstructed using tomography. The present work investigates the potential of the acousto-optic effect in acoustic holography. Two different holographic methods are examined for this purpose. One method first reconstructs the hologram plane using acousto-optic tomography and then propagates it using conventional near-field acoustic holography (NAH). The other method exploits the so-called Fourier Slice Theorem and bases all the calculations of the holographic algorithm on the Radon transform of the acoustic field. The validity of the proposed methods is examined in a simple study case by means of simulations and preliminary measurements.
Original language | English |
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Title of host publication | InterNoise 2012 |
Number of pages | 12 |
Publication date | 2012 |
Publication status | Published - 2012 |
Event | 41st International Congress and Exposition on Noise Control Engineering - Marriott Marquis, New York City, NY, United States Duration: 19 Aug 2012 → 22 Aug 2012 Conference number: 41 |
Conference
Conference | 41st International Congress and Exposition on Noise Control Engineering |
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Number | 41 |
Location | Marriott Marquis |
Country/Territory | United States |
City | New York City, NY |
Period | 19/08/2012 → 22/08/2012 |