A sound survey was conducted in a modified CF5D aircraft to determine the effectiveness of prototype floor and torso-valve mufflers in reducing the noise produced by the cockpit air conditioner. The noise levels in the rear cockpit of a modified aircraft were about 6, 10 and 12 dBA less, for air-conditioner settings 'full cold', '60 F', and 'full hot respectively, than in an unmodified aircraft flown under identical conditions. (Author)


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    Title :

    Cf5d Aircraft Cockpit-Noise Reduction


    Contributors:
    S. E. Forshaw (author) / S. W. Olsen (author)

    Publication date :

    1974


    Size :

    39 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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