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    Subsurface Exploration by Sonar Seismic Systems

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    The Boomer and the Pinger probe sonar seismic systems which are used for subsurface investigations in water-covered areas are described. The Boomer is used for deep sediment penetration studies, and the Pinger probe is used for detailed, high-resolution, shallow penetration work. The Boomer produces a low-frequency, high-energy pulse using a high-voltage discharge into an electromechanical transducer which produces an eddy-current plate repulsion. A continuous recording process produces a record of the reflections from the water-bottom and sub-bottom interfaces. The Pinger probe employs a short, high-intensity, 12-kc pulse from a crystal transducer. Recording is accomplished by a small, high-resolution Alden helix recorder. A number of examples of records are presented from each system.

    Author Information:

    Reenan, E. D. Van
    Senior geophysicist, Edgerton, Germeshausen, and Grier, Inc., Boston, Mass.

    Committee/Subcommittee: D18.02

    DOI: 10.1520/STP46182S