The effectiveness of changes in aircraft operating procedures and aircraft hardware regarding the reduction noise near airports were rated by determining the changes in land areas falling within the Noise Exposure Forecast contours. Sets of NEF contours were constructed for two different aircraft types operating from a single runway airport; the number of operations per day was varied from 200 to 1000. The changes included power cutbacks after takeoff, two segment approaches and retrofit of four-engine turbofan aircraft with acoustically-lined nacelles or with a 'quiet engine'. (Author)


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    Title :

    Noise Exposure Forecast Contour Interpretations of Aircraft Noise Tradeoff Studies


    Contributors:

    Publication date :

    1969


    Size :

    46 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





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