YANG Diange ZHENG Sifa LI Bing LI keqiang LIAN Xiaomin

(State Key Laboratory of Automotive Safety and Energy, Tsinghua University Beijing 100084)

Received Jul. 9, 2009

Revised Jul. 31, 2009

Abstract The video visualization methods for moving sound sources are very important. The spatial positions in the sound filed measurement of moving sources are measured by an automated method based on the binoculars stereo technique, the spatial coordinates of the surface of the moving sound source are determined automatically. The sound field of the surface of the moving source is reconstructed with a microphone array using the acoustic holography method for moving sound sources. The spatial mapping between the sound field and the video images is constructed, and also the time sequence of the sound field and the images is founded. Then, the reconstructed sound field and the real-world images are merged, and the visualized sound field video of the moving source is generated automatically. A sound field measurement system based on this method is developed, the measurement results of the moving sound source with this system indicate that the sound field video visualization is realized effectively with the proposed method, the sound sources and their changing process can be seen directly from the generated video, the identification and localization for the moving sound sources can be easier with this method.

PACS numbers: 43.63,43.85