The infrasonic signatures generated by the main blade slap rate of a helicoper were used in an effort to detect infrasound generated by clear air turbulence. The artificially produced infrasound and the response of the data acquisition system used are analyzed. Flight procedures used by the pilot are described and the helicopter flight information is tabulated. Graphs show the relative frequency amplitudes obtained at various microphone locations.


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    Titel :

    Propagation of sound through the Earth's atmosphere


    Beteiligte:
    Badavi, F. (Autor:in) / Meredith, R. W. (Autor:in) / Becher, J. (Autor:in)

    Erscheinungsdatum :

    1982-12-01


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    The earth's atmosphere

    Vaughan, William W. | TIBKAT | 1972


    The earth's atmosphere - density

    King-Hele, D. G. | NTRS | 1964


    Flight BEYOND The Earth's Atmosphere

    CLAUSER, FRANCIS H. | SAE Technical Papers | 1948



    Piloted entries into the earth's atmosphere

    Cheatham, D. C. / Eggleston, J. M. | NTRS | 1959