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Two sound field separation techniques based on equivalent source method are proposed:one is based on the double-layer pressure measurements and the other is based on the single-layer pressure-velocity measurements. In this paper, a sound field separation technique based on equivalent source method but using the double-layer velocity measurements is proposed. First, the theoretical description of this technique is given, and then numerical simulations and experiments are conducted to demonstrate the validity of this technique. By comparison with the technique based on double-layer pressure measurements, the superiority of the proposed technique in separating particle velocity field is shown. And also, in the numerical simulations, the influences of the strength of disturbing source and the distance between two measurement planes on separation accuracy are investigated.
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Keywords:
- sound field separation technique /
- particle velocity measurement /
- equivalent source method /
- nearfield acoustic holography
[1] Williams E G 1999 Fourier Acoustics–Sound Radiation and Nearfield Acoustic Holography (1st Ed.) (London:Academic Press)
[2] Maynard J D, Williams E G, Lee Y 1985 J. Acoust. Soc. Am. 78 1395
[3] 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]
[4] Yu F, Chen J, Chen X Z 2003 Acta Acustica 28 385 (in Chinese) [于飞, 陈剑, 陈心昭 2003 声学学报 28 385]
[5] Yu F, Chen J, Li W B, Chen X Z 2005 Acta Phys. Sin. 54 789 (in Chinese) [于飞, 陈剑, 李卫兵, 陈心昭 2005 54 789]
[6] Bi C X, Zhang Y B, Xu L, Chen X Z 2010 Acta Acustica 35 653 (in Chinese) [毕传兴, 张永斌, 徐亮, 陈心昭 2010 声学学报 35 653
[7] Li W B, Chen J, Yu F, Bi C X, Chen X Z 2005 Acta Phys. Sin. 54 1253 (in Chinese) [李卫兵, 陈剑, 于飞, 毕传兴, 陈心昭 2005 54 1253]
[8] Hald J 2006 Proceedings of Euro-Noise 2006 Tampere, Finland, May 30-June 1, 2006 p1
[9] Jacobsen F, Jaud V 2007 J. Acoust. Soc. Am. 121 1550
[10] Zhang Y B, Chen X Z, Jacobsen F 2009 J. Acoust. Soc. Am. 125 3518
[11] Langrenne C, Melon M, Garcia A 2007 J. Acoust. Soc. Am. 121 2750
[12] Bi C X, Chen X Z, Chen J 2008 J. Acoust. Soc. Am. 123 1472
[13] Bi C X, Chen X Z 2008 Proceedings of Inter-Noise 2008 Shanghai, China, October 26-29, 2008
[14] Koopmann G H., Song L, Fahnline J 1989 J. Acoust. Soc. Am. 86 2433
[15] Zhang Y B, Jacobsen F, Bi C X, Chen X Z 2009 J. Acoust. Soc. Am. 126 1257
[16] Sarkissian A 2004 J. Acoust. Soc. Am. 115 1593
[17] Sarkissian A 2005 J. Acoust. Soc. Am. 118 671
[18] Cheng M, Mann A, Pate A 1996 J. Acoust. Soc. Am. 99 3550
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[1] Williams E G 1999 Fourier Acoustics–Sound Radiation and Nearfield Acoustic Holography (1st Ed.) (London:Academic Press)
[2] Maynard J D, Williams E G, Lee Y 1985 J. Acoust. Soc. Am. 78 1395
[3] 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]
[4] Yu F, Chen J, Chen X Z 2003 Acta Acustica 28 385 (in Chinese) [于飞, 陈剑, 陈心昭 2003 声学学报 28 385]
[5] Yu F, Chen J, Li W B, Chen X Z 2005 Acta Phys. Sin. 54 789 (in Chinese) [于飞, 陈剑, 李卫兵, 陈心昭 2005 54 789]
[6] Bi C X, Zhang Y B, Xu L, Chen X Z 2010 Acta Acustica 35 653 (in Chinese) [毕传兴, 张永斌, 徐亮, 陈心昭 2010 声学学报 35 653
[7] Li W B, Chen J, Yu F, Bi C X, Chen X Z 2005 Acta Phys. Sin. 54 1253 (in Chinese) [李卫兵, 陈剑, 于飞, 毕传兴, 陈心昭 2005 54 1253]
[8] Hald J 2006 Proceedings of Euro-Noise 2006 Tampere, Finland, May 30-June 1, 2006 p1
[9] Jacobsen F, Jaud V 2007 J. Acoust. Soc. Am. 121 1550
[10] Zhang Y B, Chen X Z, Jacobsen F 2009 J. Acoust. Soc. Am. 125 3518
[11] Langrenne C, Melon M, Garcia A 2007 J. Acoust. Soc. Am. 121 2750
[12] Bi C X, Chen X Z, Chen J 2008 J. Acoust. Soc. Am. 123 1472
[13] Bi C X, Chen X Z 2008 Proceedings of Inter-Noise 2008 Shanghai, China, October 26-29, 2008
[14] Koopmann G H., Song L, Fahnline J 1989 J. Acoust. Soc. Am. 86 2433
[15] Zhang Y B, Jacobsen F, Bi C X, Chen X Z 2009 J. Acoust. Soc. Am. 126 1257
[16] Sarkissian A 2004 J. Acoust. Soc. Am. 115 1593
[17] Sarkissian A 2005 J. Acoust. Soc. Am. 118 671
[18] Cheng M, Mann A, Pate A 1996 J. Acoust. Soc. Am. 99 3550
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