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Investigation on holographic algorithm and experiment of combined wave superposition approach

Li Wei-Bing Chen Jian Bi Chuan-Xing Chen Xin-Zhao

Investigation on holographic algorithm and experiment of combined wave superposition approach

Li Wei-Bing, Chen Jian, Bi Chuan-Xing, Chen Xin-Zhao
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  • Abstract views:  3676
  • PDF Downloads:  1241
  • Cited By: 0
Publishing process
  • Received Date:  15 March 2005
  • Accepted Date:  20 August 2005
  • Published Online:  20 March 2006

Investigation on holographic algorithm and experiment of combined wave superposition approach

  • 1. 合肥工业大学噪声振动工程研究所,合肥 230009

Abstract: The general nerar-field acoustic holography (NAH) cannot reconstruct the surface acoustic information of each coherent acoustic source in coherent acoustic field,which has more than one acoustic sources with the same frequency, and they cannot realize holographic reconstruction and prediction of the independent acoustic field generated by one coherent acoustic source too.So the holographic reconstruction and prediction of coherent acoustic field has become the foremost problem to be resolved in the application of NAH. On the basis of the proposed combined wave superposition approach, an experiment is carried out to realize the holographic reconstruction and prediction of a coherent acoustic filed generated by two sound boxes.By this experiment,the feasibility and accuracy of combined wave superposition approach are demonstrated,the shortcoming of general wave superposition approach in holographic construction and prediction of coherent acoustic field are also demonstrated.The Tikhonov regularization method is proposed to control the ill-posedness of inverse acoustic problem, and the principle of filter coefficient selection is also studied.The experiment indicates that Tikhonov regularization method with appropriate filter coefficient can improve the precision of the holographic reconstruction and prediction.

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