Cabin and at-ear sound spectra in the S-70B-2 at various crew positions and flight conditions were measured in order to determine the noise attenuation properties of the ALPHA helmet and the effectiveness of active noise reduction (ANR) systems developed by the Defence Research Agency-Aerospace Division (formerly the Royal Aerospace Establishment) and the BOSE Corporation. Results show that if newly proposed hearing conservation guidelines are adopted, aircrew wearing the ALPHA helmet would require additional attenuation devices. It is recommended that an ANR system be incorporated into the S-70B-2 as such a system would allow realistic flight duration to be maintained, improve voice communication, and reduce aircrew fatigue.... S70B helicopters, Noise reduction, Acoustic attenuation.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    In-Flight Evaluation of Noise Levels and Assessment of Active Noise Reduction Systems in the Seahawk S-70B-2 Helicopter


    Beteiligte:
    R. B. King (Autor:in) / D. A. Foran (Autor:in)

    Erscheinungsdatum :

    1992


    Format / Umfang :

    46 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Seahawk Superior

    Online Contents | 2011


    SYSTEMATIC SEAHAWK

    Colucci, Frank | Online Contents | 1995


    Vibration Mitigation Analysis of a Seahawk Helicopter Seat Suspension Concept

    S. D. Smith / B. C. Steinhauer / W. C. Glass et al. | NTIS | 2019


    Stretching the Seahawk

    Online Contents | 1996