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首页> 外文期刊>Journal of Asian earth sciences >Acoustic impedance properties of seafloor sediments off the coast of Southeastern Hainan, South China Sea
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Acoustic impedance properties of seafloor sediments off the coast of Southeastern Hainan, South China Sea

机译：南海海南东南沿海海底沉积物的声阻抗特性

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摘要

Geoacoustic parameters are essential inputs to sediment wave propagation theories and are vital to underwater acoustic environment and explorations of the sea bottom. In this study, 21 seafloor sediment samples were collected off the coast of southeastern Hainan in the South China Sea. The sound speed was measured using a portable WSD-3 digital sonic instrument and the coaxial differential distance measurement method. Based on the measured sound speed and physical properties, the acoustic impedance and the pore-water-independent index of impedance (IOI) were calculated in this study. Similar to the sound speed, the IOI values are closely related to the sediment physical properties and change gradually from the northwest to the southeast. The relations between IOI and physical properties were studied and compared to the relations between the sound speed and physical properties. IOI is better correlated to physical properties than sound speed. This study also uses an error norm method to analyze the sensitivity of IOI to the physical parameters in the double-parameter equations and finds that the most influential physical parameters are as follows: wet bulk density porosity clay content mean particle size.
机译：地声参数是沉积波传播理论的基本输入，对于水下声环境和海底勘探至关重要。在这项研究中，在南海海南东南沿海采集了21个海底沉积物样本。使用便携式WSD-3数字声音仪器和同轴差分距离测量方法测量声速。根据测得的声速和物理特性，计算了声阻抗和与孔隙水无关的阻抗指数（IOI）。与声速相似，IOI值与沉积物的物理特性密切相关，并从西北向东南逐渐变化。研究了IOI与物理特性之间的关系，并将其与声速与物理特性之间的关系进行了比较。与声音速度相比，IOI与物理属性的关联更好。这项研究还使用误差范数方法分析了IOI对双参数方程式中物理参数的敏感性，发现最有影响力的物理参数如下：湿松密度>孔隙度>粘土含量>平均粒径。

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  • 来源
    《Journal of Asian earth sciences》 |2018年第1期|1-7|共7页
  • 作者

    Hou Zhengyu; Chen Zhong; Wang Jingqiang; Zheng Xufeng; Yan Wen; Tian Yuhang; Luo Yun;

  • 作者单位

    Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China;

    Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China;

    Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, 1 Wenhai Rd, Qingdao 266237, Peoples R China;

    Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China;

    Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China;

    Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China;

    Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Acoustic impedance; Index of impedance; Sound speed; Seafloor sediments;

    机译：声阻抗;阻抗指数;声速;海底沉积物;

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