An active noise reduction system was developed for use in aircrew flying helmets in which the acoustic noise field inside the ear defender is detected using a miniature microphone and an antiphase signal is fed back to a communications telephone within the ear defender. Performance of the active noise reduction system in a laboratory trial simulating flight conditions is shown to be satisfactory.


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    Title :

    An active noise reduction system for aircrew helmets


    Contributors:
    Wheeler, P. D. (author) / Rawlinson, D. (author) / Pelc, S. F. (author) / Dorey, T. P. (author)


    Publication date :

    1978-08-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English


    Keywords :


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