摘要
近场声全息要获得较高的重建精度必须在全息面上大孔径范围内进行密集的数据采集,需要大量的测量点,测量任务十分繁重。因此在保证重建精度的前提下研究如何有效地减少全息面测量点数对NAH的意义十分重大。提出一种利用支持向量回归对全息面进行插值的方法,该方法可以在全息面传声器数目较少时通过插值提高重建精度,因而可大幅地减少全息面的测量点数。试验表明该方法是有效的。
In near-field acoustic holography (NAH),accurate reconstruction requires dense measurement grid on large hologram,and so a huge number of microphones are usually demanded.It is significant to find a way to reduce the microphones number effectively while keeping high reconstruction accuracy in NAH implementation.A hologram interpolation approach based on support vector regression (SVR) was presented in the paper.Reconstruction accuracy can be improved significantly with small number of microphones.Therefore,the number of measurement points can be reduced.The presented approach was validated by the experimental results.
出处
《振动与冲击》
EI
CSCD
北大核心
2010年第3期128-131,157,共5页
Journal of Vibration and Shock
关键词
近场声全息
支持向量回归
插值
重建精度
near-field acoustic holography
support vector regression
interpolation
reconstruction accuracy
