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[1]牛富强,杨燕明,许肖梅*,等.厦门海域中华白海豚定位click信号特性[J].厦门大学学报(自然科学版),2012,51(5):951.
 NIU Fu qiang,YANG Yan ming,XU Xiao mei*,et al.Study on the Characteristics of Echolocation Clicks from IndoPacific Humpback Dolphins (Sousa chinensis) in Xiamen[J].Journal of Xiamen University(Natural Science),2012,51(5):951.
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《厦门大学学报(自然科学版)》[ISSN:0438-0479/CN:35-1070/N]

卷:
51卷
期数:
2012年第5期
页码:
951
栏目:
研究论文
出版日期:
2012-09-20

文章信息/Info

Title:
Study on the Characteristics of Echolocation Clicks from IndoPacific Humpback Dolphins (Sousa chinensis) in Xiamen
作者:
牛富强12杨燕明2许肖梅1*文洪涛2刘贞文2
1.厦门大学海洋与地球学院, 福建 厦门361005; 2.国家海洋局第三海洋研究所, 福建 厦门361005
Author(s):
NIU Fuqiang12YANG Yanming2XU Xiaomei1*WEN Hongtao2LIU Zhenwen2
1.College of Ocean & Earth Sciences,Xiamen University,Xiamen 361005,China; 2.Third Institute of Oceanography,State Oceanic Administration,Xiamen 361005,China)
关键词:
中华白海豚定位click频谱分析信号特征
Keywords:
Sousa chinensisecholocation clicksspectrum analysissignal characteristics
分类号:
P 733.2; Q 62
文献标志码:
-
摘要:
对厦门海域中华白海豚的发声及信号特性进行研究,采用高频宽带数据记录系统获取了大量中华白海豚click信号,并利用Matlab软件和Excel 2007对这些信号进行时域和频域分析.结果表明:click信号通常以不同长度的序列形式出现,单个click信号长度分布在(33±4) μs;频谱能量分布广,低频至10 kHz,高频达200 kHz以上,具有单峰和双峰2种频谱结构,峰值频率、3 dB带宽和10 dB带宽分别为(113.3±16.3)、(48.3±14.2)和(113.3±16.4) kHz.中华白海豚click信号双峰的频率分布,为其在海底混响严重的浅海环境准确识别目标提供了保障.
Abstract:
The vocalizations and signal characteristics of humpback dolphins (Sousa chinensis) in Xiamen were studied in this paper.A large number of original click signals were obtained by a broad frequencyband recording system.These signals were analysed as waveforms and spectrograms using Matlab tool and Excel 2007.Results of this study indicate that clicks of humpback dolphins occur as trains.The duration of each click trains vary wildly,ranging from a few seconds to tens of seconds,but single click have a short duration around (33±4) μs.The echolocation clicks have a wide range of frequency distribution between 10 kHz and 200 kHz.Click signals have two types of spectrum structure and have an averaged peak frequency of (113.3±16.3) kHz with 3 dB bandwidth of (48.3±14.2) kHz.The 10 dB bandwidth of (113.3±16.4) kHz is also given in the results.Most of the echolocation clicks have a bimodal frequency distribution,which provides a good range resolution capability that should enable dolphins to be able to perform fine target discrimination in a shallow water environment where bottom reverberation can be troublesome.

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备注/Memo

备注/Memo:
收稿日期:20120316 基金项目:海洋公益性行业科研专项(2011050113);中国博士后科学基金项目(2011M501082) *通信作者:xmxu@xmu.edu.cn
更新日期/Last Update: 2012-09-20