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Research on localization technology of the source of modulated sound field |
ZHANG Shun1, 2,ZHU Hai-chao1, 2,MAO Rong-fu1, 2 |
1. Institute of Noise & vibration, Naval University of Engineering Wuhan 430033,China;2. National Key Laboratory on Ship Vibration & Noise Wuhan 430033,China |
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Abstract The need for improving the precision of feature extraction of the modulated sound field and reducing the influence of noise on reconstruction result, the near-field acoustic holography (NAH) analysis technology based on complex analytic wavelet transform was proposed. Firstly, complex analytic wavelet transformation was induced to demodulate sound signals and pick-up the modulating components, and then modulating component was reconstructed by NAH technique. The results of the simulation and experiments demonstrate that the method proposed can exactly localize modulated sound field, reduce the computational complexity, has the better anti-noise performance and accuracy of the reconstruction.
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Received: 13 March 2013
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