A series of subjective response laboratory tests were conducted to determine the effectiveness of reducing aircraft noise by treating the aircraft engine nacelles with acoustically absorbent material. A total of 108 subjects participated in the magnitude estimation tests. The subjects were selected from persons who had previously been interviewed and classified according to selected psychological characteristics. The subjects lived in three general areas located at three specified distances from New York's Kennedy Airport. The aircraft signals used in the tests consisted of tape recordings of the landing approach noise of a B-727 aircraft under normal operating conditions. These recordings were electronically altered to simulate an aircraft with acoustically treated nacelles to achieve noise reductions of approximately 6 EPNdB and 12 EPNdB. The results from these tests indicate that significant reductions in annoyance resulted from the synthesized nacelle treatments. (Author)


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Annoyance Judgements of Aircraft with and Without Acoustically Treated Nacelles


    Beteiligte:
    P. N. Borsky (Autor:in) / S. Leonard (Autor:in)

    Erscheinungsdatum :

    1973


    Format / Umfang :

    73 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch







    Aircraft nacelles having adjustable chines

    KONINGS CHRISTOPHER ANDREW | Europäisches Patentamt | 2023

    Freier Zugriff

    Aircraft nacelles having adjustable chines

    VIJGEN PAUL M / CLARK ADAM M / PHUNG CONNIE et al. | Europäisches Patentamt | 2022

    Freier Zugriff