Although flight helmets selected for Navy use may possess exceptionally good noise attenuation qualities, maximum attenuation may not always be realized when the helmet is worn, particularly if the helmet does not fit. The lack of a standardized procedure for fitting flight helmets often results in a poor compromise that sacrifices noise exclusion for comfort. A procedure that involves the use of a noise source and an automatic recording audiometer has been developed as an aid in the fitting process. The noise source allows the aviator to detect acoustical leakage around his ears so that a better fit can be effected. Masked hearing threshold levels obtained with the helmet's earphones may be used to demonstrate improved performance. (Author)


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    A Technique for Optimal Fitting of Flight Helmets


    Contributors:

    Publication date :

    1970


    Size :

    12 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    Aerodynamic forces on flight crew helmets

    SESTAK, TIMOTHY / HOWARD, RICHARD / HEARD, CHESTER | AIAA | 1988


    Aerodynamic forces on flight crew helmets

    SESTAK, TIMOTHY A. / HOWARD, RICHARD M. / HEARD, CHESTER A. | AIAA | 1989


    Helmets

    Online Contents | 1994



    Marine helmets

    PARK SUNG MIN | European Patent Office | 2020

    Free access