Partial field decomposition of multi-source cyclostationary sound field

作者：Chen, Zhimin^*; Zhu, Haichao; Mao, Rongfu

来源：APPLIED ACOUSTICS, 2012, 73(5): 524-528.

DOI：10.1016/j.apacoust.2011.10.006

• Cyclostationary sound field
• Near-field acoustic holography
• Cyclic spectral density
• Singular value decomposition
• Partial field decomposition

The cyclostationary sound field is a kind of special non-stationary field which has obvious modulation phenomena. Conventional planar near-field acoustic holography (PNAH) technique cannot exactly reflect its modulation characteristics. If the cyclic spectral density (CSD) instead of the complex sound pressure is adopted as the reconstruction variable, the modulating wave and carrier wave components of the cyclostationary sound field can be extracted effectively. A new technique called cyclostationary PNAH utilizing the CSD is proposed in this paper. Based on this technique, the problem of partial field decomposition by singular value decomposition (SVD) of multiple incoherent cyclostationary sound sources is researched. The results of numerical simulation and experiments show that the CPNAH technique and SVD decomposition method are effective.

• 出版日期2012-5
• 单位中国人民解放军海军工程大学