Near-field acoustic holography with three-dimensional scanning measurements

作者：Luo, Zhong-Wei; Comesana, Daniel Fernandez; Zheng, Chang-Jun; Bi, Chuan-Xing^*

来源：Journal of Sound and Vibration, 2019, 439: 43-55.

DOI：10.1016/j.jsv.2018.09.049

• Near-field acoustic holography
• Holographic data measurement
• 3D scanning measurement
• Inverse boundary element method

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.

• 出版日期2019-1-20
• 单位合肥工业大学