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Compared with the waveguide invariant, the interference structures in low-frequency acoustic field are more comprehensively described by four system functions: coherent function, power response function, spread function and dual-frequency function, from space-time filter theory. A stable interference structure in the low-frequency acoustic field is testified based on theoretical analysis, simulation and sea trial data processing. When the target moves in a uniform rectilinear motion from far to near then from near to far, the interference structure of coherent function (LOFARgram) appears to be a family of quasi hyperbolas; the interference structure obtained by power response function represents the group delay difference and the dispersive characteristic of the normal mode; and the phase slowness difference can be exhibited by dual-frequency function. Each system function owns special characteristics, which can give prominence to certain features of the interference structure.
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Keywords:
- interference structure /
- space-time filter /
- waveguide invariant /
- low-frequency acoustic field
[1] Hui J Y, Sun G C, Zhao A B 2008 Acta Acustica 33 300 (in Chinese) [惠俊英, 孙国仓, 赵安邦 2008声学学报 33 300]
[2] Yu Y, Hui J Y, Zhao A B, Sun G C, Teng C 2008 Acta Phys. Sin.57 5742 (in Chinese) [余赟, 惠俊英, 赵安邦, 孙国仓,滕超 2008 物理学报 57 5742]
[3] Yu Y, Hui J Y, Chen Y, Sun G C, Teng C 2009 Acta Phys. Sin. 586335 (in Chinese) [余赟, 惠俊英, 陈阳, 孙国仓,滕超 2009 物理学报 58 6335]
[4] Chuprov S D 1982 Interference structure of sound field in thelayered ocean, in Brekhovskikh L M, Andreeva I B (ed) OceanAcoustics. Modern State (Moscow Nauka) pp 71-91
[5] Brekhovskikh L M, Lysanov Y P 2002 Fundamentals of OceanAcoustics (New York: Springer-Verlag)
[6] D'Spain G L, Kuperman W A 1999 J. Acoust. Soc. Am. 106 2454
[7] Wang N, Gao D Z, Wang H Z 2010 J. Harbin Eng. Univ. 31 825(in Chinese) [王宁, 高大治, 王好忠 2010哈尔滨工程大学 31 825]
[8] Guo G Q, Yang Y X, Sin C 2011 Chin. Sci. Bull. 56 142
[9] Turgut A, Orr M, Rouseff D 2010 J. Acoust. Soc. Am. 127 73
[10] Cockrell K L, Schmidt H 2010 J. Acoust. Soc. Am. 127 2780
[11] Yu Y, Hui J Y, Yin J W, Hui J, Wang Z J Acta Acustica (accepted)(in Chinese)[余赟, 惠俊英, 殷敬伟, 惠娟, 王自娟声学学报 (待发表)]
[12] Rouseff D, Spindel R C 2002 AIP Conference Proceedings 621137
[13] Yang T C 2003 J. Acoust. Soc. Am. 113 1342
[14] Hui J Y, Sheng X L 2007 Underwater Acoustic Channel(Beijing: National Defense Industry Press) pp77-81 (in Chinese)[惠俊英, 生雪莉 2007 水下声信道(第二版) (北京:国防工业出版社) 第77--81页]
[15] Yu Y, Hui J Y, Zhao A B, Lin F 2011 Acta Armament 32 274 (inChinese) [余赟, 惠俊英, 赵安邦, 林芳 2011兵工学报 32 274]
[16] Yu Y, Hui J Y 2011 Acta Acustica 36 256 (in Chinese) [余赟, 惠俊英 2011 声学学报 36 256]
[17] An L, Wang Z Q, Lu J R 2008 J. Electron. Information Technol.30 2930 (in Chinese)[安良, 王志强, 陆佶人 2008 电子与信息学报 30 2930]
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[1] Hui J Y, Sun G C, Zhao A B 2008 Acta Acustica 33 300 (in Chinese) [惠俊英, 孙国仓, 赵安邦 2008声学学报 33 300]
[2] Yu Y, Hui J Y, Zhao A B, Sun G C, Teng C 2008 Acta Phys. Sin.57 5742 (in Chinese) [余赟, 惠俊英, 赵安邦, 孙国仓,滕超 2008 物理学报 57 5742]
[3] Yu Y, Hui J Y, Chen Y, Sun G C, Teng C 2009 Acta Phys. Sin. 586335 (in Chinese) [余赟, 惠俊英, 陈阳, 孙国仓,滕超 2009 物理学报 58 6335]
[4] Chuprov S D 1982 Interference structure of sound field in thelayered ocean, in Brekhovskikh L M, Andreeva I B (ed) OceanAcoustics. Modern State (Moscow Nauka) pp 71-91
[5] Brekhovskikh L M, Lysanov Y P 2002 Fundamentals of OceanAcoustics (New York: Springer-Verlag)
[6] D'Spain G L, Kuperman W A 1999 J. Acoust. Soc. Am. 106 2454
[7] Wang N, Gao D Z, Wang H Z 2010 J. Harbin Eng. Univ. 31 825(in Chinese) [王宁, 高大治, 王好忠 2010哈尔滨工程大学 31 825]
[8] Guo G Q, Yang Y X, Sin C 2011 Chin. Sci. Bull. 56 142
[9] Turgut A, Orr M, Rouseff D 2010 J. Acoust. Soc. Am. 127 73
[10] Cockrell K L, Schmidt H 2010 J. Acoust. Soc. Am. 127 2780
[11] Yu Y, Hui J Y, Yin J W, Hui J, Wang Z J Acta Acustica (accepted)(in Chinese)[余赟, 惠俊英, 殷敬伟, 惠娟, 王自娟声学学报 (待发表)]
[12] Rouseff D, Spindel R C 2002 AIP Conference Proceedings 621137
[13] Yang T C 2003 J. Acoust. Soc. Am. 113 1342
[14] Hui J Y, Sheng X L 2007 Underwater Acoustic Channel(Beijing: National Defense Industry Press) pp77-81 (in Chinese)[惠俊英, 生雪莉 2007 水下声信道(第二版) (北京:国防工业出版社) 第77--81页]
[15] Yu Y, Hui J Y, Zhao A B, Lin F 2011 Acta Armament 32 274 (inChinese) [余赟, 惠俊英, 赵安邦, 林芳 2011兵工学报 32 274]
[16] Yu Y, Hui J Y 2011 Acta Acustica 36 256 (in Chinese) [余赟, 惠俊英 2011 声学学报 36 256]
[17] An L, Wang Z Q, Lu J R 2008 J. Electron. Information Technol.30 2930 (in Chinese)[安良, 王志强, 陆佶人 2008 电子与信息学报 30 2930]
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