The use of diving techniques for in situ geoacoustic measurements on the sea-floor

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The use of diving techniques for in situ geoacoustic measurements on the sea-floor

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Title: The use of diving techniques for in situ geoacoustic measurements on the sea-floor
Author: Akal, T
Abstract: Standard laboratory methods exist for the analysis of the geoacoustic characteristics of sea-floor sediments. These methods are generally applied to core samples taken from the bottom and brought to the surface for analysis rather than being analyzed in situ. The results are not completely reliable because of the effects of sample disturbance and temperature and pressure changes on the analysis. Such laboratory techniques do not allow the direct determination of the response of bottom materials to seismo-acoustic waves. Therefore techniques are being developed to conduct in situ measurements using divers. One such technique consists of recording the responses of five in-line bottom-mounted, tri-axial geophone stations and hydrophones to impulse signals. The signals are generated by a spear-gun mounted on a frame that shoots into a mass of cast iron. The method and results obtained are presented.
Description: American Academy of Underwater Sciences (http://www.aaus.org/)
URI: http://archive.rubicon-foundation.org/9868
Date: 1985

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