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.
An active noise reduction system for aircrew helmets
01.08.1978
Aufsatz (Konferenz)
Keine Angabe
Englisch
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