加州海狮水下声信号的分析
ANALYSIS OF UNDERWATER SOUND SIGNAL OF THE CALIFORNIA SEA LION (ZALOPHUS CALIFORNIANUS LESSON 1828)
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摘要: 国外对加州海狮水下声进行了不少研究,但尚未取得一致结论。我们对北京动物园中的加州海狮(Zalophus californianus) “东东”和“玲玲”的水下声信号进行了测试和分析。发现它们在水下发出许多种声信号。在缓慢的自由游泳状态发出幅度较低、没有明显规律的脉冲,而当快游接近池壁或跳出水面之前和入水之时,则发出上升时间短、幅度很大的脉冲列。“东东”三岁半,好动,发声极多,其脉冲声信号较易测到。Abstract: This paper presents a set of typical waveforms and spectrums of the California sea lion underwater sound pulse signal. On the basis of a considerable amount of experimental data, statistical characteristics of the sea lion's sound pulses and pulse trains are calculated and the sea lion's sound pressure level is estimated.We conclude with a brief discussion of the sea lion's echolocation capability.
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Poulter, T,C.,Sea lion echo ranging, J. A, S. A.,43(1968),6. Poulter, T.C.,Sonar signals of the sea lion, Science, 139(1963),763-765. Poulter, T. C.,System of echolocation, in animal sonar systems-Biology and Bionics, edited by R.G. Busnel, 157-186. Poulter, T.C.,The sonar of the sea lion, IEEE, UE-10(1963). Schevill, W.E.,Sea lion echo rangingy J.A.S,A., 43(1968),6. Schusterman, R.J.,Gentry, R, and Schmook, J., Underwater sound production by captive California sea lion, Zalophns call fornianus, Zoologica, 52(1967),1, 21-24. Schusterman, R.J.,Kellogg, W.N.,and Rice, C.E.,Underwater visual discrimination by California sea lion, Science, 147(1965),3585. 1594-1596. Shaver, H.N.and Poulter, T.C.,Sea lion echo ranging, J. A, S, A.,42(1967),428-437. -
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