A portable underwater sound-pressure measuring system was developed and tested. The system was shown to be capable of measuring very low ambient-noise levels. High self-noise levels at frequencies less than 50 to 63 Hz are likely to be present if measurements are made from a drifting ship, and the cable is towed at drift velocity, probably because of a combination of flow noise and noise arising from cable vibrations. These high self-noise levels can be satisfactorily eliminated by using a slack cable system as described in the report. (Author)


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    Title :

    A Portable, General-Purpose Underwater Sound Measuring System


    Contributors:
    M. A. Calderon (author) / G. M. Wenz (author)

    Publication date :

    1967


    Size :

    49 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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