海洋物理学

海底沉积物声衰减同轴差距衰减测量法与其他测量方法的对比研究

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收稿日期: 2008-11-02

  修回日期: 2009-01-13

  网络出版日期: 2010-02-05

A study on acoustic attenuation measurement methods of seafloor sediments

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Received date: 2008-11-02

  Revised date: 2009-01-13

  Online published: 2010-02-05

摘要

本文引用格式

,梁润华,吴百海,邹大鹏,卢 博,陈飞燕,曾洁莹, . 海底沉积物声衰减同轴差距衰减测量法与其他测量方法的对比研究[J]. 热带海洋学报, 2009 , 28(3) : 40 -44 . DOI: 10.11978/j.issn.1009-5470.2009.03.040

Abstract

Taking the precise measurement data by Hamilton’s parallel differential distance attenuation measurement method (PDDAMM) as the standard, the authors compare the Qian’s vertical coaxial attenuation measurement method (VCAMM) and Liu’s vertical differential distance attenuation measurement method (VDDAMM) with their coaxial differential distance attenuation measurement method (CDDAMM). By comparing the data from these three experiments with those by Hamilton’s method, the authors further analyze the connection of attenuation with sample length and measurement frequency as well as the benefits and drawbacks of these three experiments. Compared with VCAMM, CDDAMM is much more advisable in respect of reducing perturbations, which result from measuring instrument and the coupling between sample and transducer, and of sample length. Compared with VDDAMM, CDDAMM ensures in theory the coaxiality and directivity of compression wave in spreading process, and its data are much more precise than those by VDDAMM when using the same laboratory instrument.

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