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By the wave superposition approach a method of enhancing the spatial resolution of the nearfield acoustic holography is proposed. According to wave superposition approach, the source strengths of fictitious sources placed on the fictitious surface which is near the hologram surface are obtained by measuring the hologram pressure signal, then these fictitious sources are used to realize the interpolation of acoustic pressure, finally, the reconstruction can be done by the interpolated hologram pressure. By this method the spatial resolution of the reconstructed image can be improved, the measurement workload is reduced, and the measurement process is simplified. The parameters affecting the interpolated result are reasonably chosen by numerical simulations and the availability of this method is proved by numerical simulations and experimental resuets.
[1] Williams E G, Maynard J D 1980 Phys. Rev. Lett. 45 554
[2] Maynard J D, Williams E G, Lee Y 1985 J. Acoust. Soc. Am. 78 1395
[3] Kim B K, Ih J G 1996 J. Acoust. Soc. Am. 100 3003
[4] Wang Z, Wu S F 1997 J. Acoust. Soc. Am. 102 2020
[5] Harris M C, Blotter J D 2006 J. Acoust. Soc. Am. 119 809
[6] Xu L, Bi C X, Chen X Z, Chen J 2008 Chinese Science Bulletin 53 3142
[7] Xu L, Bi C X, Chen X Z, Chen J 2007 Science Paper Online 2 181(in Chinese) [徐 亮、毕传兴、陈心昭、陈 剑 2007 中国科技论文在线 2 181]
[8] Koopmann G H, Song L, Fahnline J 1989 J. Acoust. Soc. Am. 86 2433
[9] Zhang H B, Jiang W K, Wan Q 2008 Acta Phys. Sin. 57 313 (in Chinese) [张海滨、 蒋伟康、 万 泉 2008 57 313]
[10] Li J Q, Chen J, Yang C, Jia W Q 2008 Acta Phys. Sin. 57 4258(in Chinese) [李加庆、 陈 进、 杨 超、 贾文强 2008 57 4258]
[11] Yu F, Chen X Z, Li W B, Chen J 2004 Acta Phys. Sin. 53 2607(in Chinese) [于 飞、 陈心昭、 李卫兵、 陈 剑 2004 53 2607]
[12] Xu L, Bi C X, Chen J, Chen X Z 2007 Acta Phys. Sin. 56 2776(in Chinese) [徐 亮、 毕传兴、 陈 剑、 陈心昭 2007 56 2776]
[13] Sarkissian A 2004 J. Acoust.Soc. Am. 115 1593
[14] Bi C X, Chen C X, Chen J 2008 J. Acoust. Soc. Am. 123 1472
[15] Williams E G 2003 J. Acoust. Soc. Am.113 1273
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[1] Williams E G, Maynard J D 1980 Phys. Rev. Lett. 45 554
[2] Maynard J D, Williams E G, Lee Y 1985 J. Acoust. Soc. Am. 78 1395
[3] Kim B K, Ih J G 1996 J. Acoust. Soc. Am. 100 3003
[4] Wang Z, Wu S F 1997 J. Acoust. Soc. Am. 102 2020
[5] Harris M C, Blotter J D 2006 J. Acoust. Soc. Am. 119 809
[6] Xu L, Bi C X, Chen X Z, Chen J 2008 Chinese Science Bulletin 53 3142
[7] Xu L, Bi C X, Chen X Z, Chen J 2007 Science Paper Online 2 181(in Chinese) [徐 亮、毕传兴、陈心昭、陈 剑 2007 中国科技论文在线 2 181]
[8] Koopmann G H, Song L, Fahnline J 1989 J. Acoust. Soc. Am. 86 2433
[9] Zhang H B, Jiang W K, Wan Q 2008 Acta Phys. Sin. 57 313 (in Chinese) [张海滨、 蒋伟康、 万 泉 2008 57 313]
[10] Li J Q, Chen J, Yang C, Jia W Q 2008 Acta Phys. Sin. 57 4258(in Chinese) [李加庆、 陈 进、 杨 超、 贾文强 2008 57 4258]
[11] Yu F, Chen X Z, Li W B, Chen J 2004 Acta Phys. Sin. 53 2607(in Chinese) [于 飞、 陈心昭、 李卫兵、 陈 剑 2004 53 2607]
[12] Xu L, Bi C X, Chen J, Chen X Z 2007 Acta Phys. Sin. 56 2776(in Chinese) [徐 亮、 毕传兴、 陈 剑、 陈心昭 2007 56 2776]
[13] Sarkissian A 2004 J. Acoust.Soc. Am. 115 1593
[14] Bi C X, Chen C X, Chen J 2008 J. Acoust. Soc. Am. 123 1472
[15] Williams E G 2003 J. Acoust. Soc. Am.113 1273
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