In an airplane factory, noise from riveting produces short-duration, high-amplitude sounds with high-level components at frequencies where the human ear is most sensitive. High-pressure air exhausted from air-powered tools is another prevalent noise source in airplane manufacture and repair and can be a major contributor to a worker's daily exposure to noise. Control of the impulsive sound of riveting without affecting production was achieved by developing a new way to apply constrained-layer damping pads to the skin of an aluminum panel. A pad is held against a panel by a vacuum pressure about 90 kPa. The time-average, A-weighted sound level at a position representative of the ear of the operator of a riveting hammer was reduced by about 5.5 dB by application of the damping pads. Compressed-air tool-exhaust noise was reduced by multi-cavity mufflers consisting of reactive (tuned), resistive, and dispersive elements. The total 8-hour-average A-weighted sound level was reduced from approximately 93 dB to approximately 85 dB at the location of a worker exposed to the noise from tools powered by compressed air.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Case history: Noise control in airplane manufacturing


    Weitere Titelangaben:

    Eine Fallstudie: Lärmminderungsmaßnahmen in der Flugzeugproduktion


    Beteiligte:
    Amram, M. (Autor:in) / Brooks, G.E. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1996


    Format / Umfang :

    7 Seiten, 8 Bilder, 4 Tabellen, 2 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




    Airplane spoiler manufacturing method, airplane spoiler and airplane

    FENG CHENGHUI / WANG LIPING / ZHU XIAOJUN et al. | Europäisches Patentamt | 2015

    Freier Zugriff

    THE NUMERICAL HISTORY OF AIRPLANE MANUFACTURING IN XX CENTURY

    Kuzmin, Y. V. | British Library Conference Proceedings | 2018


    Effect of airplane noise on man and noise control measures

    Borshchevskiy, I. YA. / Krylov, Yu. V. / Kuznetsov, V. S. et al. | NTRS | 1964


    Airplane noise and regulations

    POWERS, J. | AIAA | 1973


    Designing to reduce airplane noise

    Engineering Index Backfile | 1948