期刊
JOURNAL OF SOUND AND VIBRATION
卷 439, 期 -, 页码 43-55出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jsv.2018.09.049
关键词
Near-field acoustic holography; Holographic data measurement; 3D scanning measurement; Inverse boundary element method
资金
- National Natural Science Foundation of China [11674082, 11872168]
- Fundamental Research Funds for the Central Universities [PA2017GDQT0020, JZ2018HGTB0257]
Data acquisition is one of the key steps in near-field acoustic holography. Most of the existing measurement methods become time-consuming or even impractical when the total number of measurement points is excessively large, for example for the sound field reconstruction of a large-scale source or for a mid-high frequency problem. Alternatively, a three-dimensional scanning near-field acoustic holography (3DSNAH) method is hereby proposed to overcome such problems providing the sound field is time stationary. Data measurement at a large number of points can be accomplished in a matter of minutes by using scanning measurements to acquire the holographic data. The data is then used in an inverse boundary element method to obtain a detailed reconstruction of the sound field radiated by the sound source. Comparison with the traditional point-by-point measurement method demonstrates that the proposed method can acquire holographic data of good quality and reconstruct the sound field with a reasonable accuracy, which verifies the feasibility of the 3DSNAH. (C) 2018 Elsevier Ltd. All rights reserved.
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