Abstract：The sound field scanning scheme based on acousto-optic effect is investigated and demonstrated. By rotating and translating the loudspeaker, the laser vibrometer can measure the integral projection of the sound pressure along different positions and directions. Using the obtained projection information, the sound pressure distribution of the measured sound field can be reconstructed by inverse Radon transform algorithm. The optical method can improve the experimental efficiency and reduce the experimental time under the certain reconstructing resolution. The 2 kHz sound field emitted by the loudspeaker is reconstructed, and the result shows the two-dimensional spatial distribution of the sound pressure , the spatial and angular resolution are up to 5 mm , 10°.
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2018, Vol. 39 
