Abstract Nearfield acoustical holography is a powerful tool for imaging of acoustic sources. In this article, the basic theory treating steady-state acoustic radiation with generalized holography has been discussed. By holographic imaging, the vibration characteristics of irregular objects, the Chinese ancient musical instrument, the one-tone chime stone and the two-tone chime stone provided by the Institute of Archaeology, the Museum of Hubei Province, have been researched. The results show that the ancient chime stone has two main vibration modes, which make up the base of sound produced by the instrument. As for the two-tone chime stone, it is not so long and wide as the single-tone chime stone, but thicker and smoother than the single-tone chime stone. When it is excited at different positions, although it radiates sounds of different frequencies, its vibration modes are similar. This may be related to its dimensions and shape. The research is helpful for studying the sound producing system and the radiated field characteristics of the chime stone.
Received: 04 June 2000
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation of China, (Grant No.19634050) and the State key Laboratory of Acoustics.
Cite this article:
Cheng Jian-zheng (程建政), Zhang De-jun (张德俊), Lan Cong-qing (兰从庆), Ye Chao-hui (叶朝辉) RESEARCH ON VIBRATION MODES OF THE CHINESE CHIME STONE 2000 Chinese Physics 9 913
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