Open AccessSound field separation technique based on single surface measurement using pressure-velocity transducers
Author(s) -
Yongbin Zhang,
Xu Liang,
ChuanXing Bi,
Chen Xinzhao
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.8364
Subject(s) - separation (statistics) , fast fourier transform , acoustics , fourier transform , short time fourier transform , sound pressure , acoustic holography , separation method , transducer , source separation , materials science , surface (topology) , computer science , holography , optics , algorithm , physics , fourier analysis , mathematics , mathematical analysis , chemistry , chromatography , geometry , machine learning
The sound field separation technique based on single surface measurement is investigated in this paper. A modified separation formula based on the spatial Fourier transform is presented to overcome the inherent singularity of the current single surface separation technique. However due to the wraparound error associated with fast Fourier transform FFT, the accuracy of separation technique based on FFT is not satisfactory and a novel separation method based on the statistically optimized nearfield acoustic holography is proposed to improve the separation. The simulations as well as experiments carried out with the p-u intensity probe produced by Microflown demonstrate the validity of the proposed modified formula and the effectiveness of the new separation method.