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《Audio Engineering》 1991-03
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Application of Laser Holographic Interference and Computer Technique to the Vibration Analysis of Earphone

Li Hongqi Tong Jingwei  
The theory of applying the holographic interference method to the vibration analysis of earphone, the vibration amplitude measured experimentally and the rule of its distribution are expounded. The relation curves of resonance frequency of diaphragm and the order of interference fringe varied with frequency and voltage are obtained. Through the information on the holographic interference pattern processed by computer, a vibration-type stereo pattern is given. The experiment reveals the remarkable features intuition and reliability brought about vibration analysis on an object.
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