Acoustical properties of coal can be measured accurately and with relative ease with aid of digital two-channel sine-wave sound generator. Generator is expected to provide information for development of acoustic devices for measuring thickness of coal in longwall mining. In echo-cancellation measurements, sound bursts are sent to coal sample from opposite directions. Transmitted and reflected amplitudes and phases are measured by transducers to determine coal properties.


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    Titel :

    Sound-burst Generator for Measuring Coal Properties


    Beteiligte:
    Hadden, W. J. J. (Autor:in) / Mills, J. M. (Autor:in) / Pierce, A. D. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1982-12-01



    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


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