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

    Erscheinungsdatum :

    1982


    Format / Umfang :

    24 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Propagation of sound through the Earth's atmosphere

    Badavi, F. / Meredith, R. W. / Becher, J. | NTRS | 1982


    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