Sound-pressure levels were measured on the ground while the helicopter flew over an array of microphones placed either in an open field or in the centre of a city street confined by tall buildings. It was found that the noise in the latter case was initially lower but built up to a higher peak, an effect attributed to a reverberant sound field in the street. A quantitative theoretical explanation is given.


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    Title :

    Helicopter noise experiments in an urban environment


    Additional title:

    Hubschraubergeraeuschmessungen in staedtischer Umgebung


    Contributors:
    Kinney, W.A. (author) / Pierce, A.D. (author) / Rickley, E.J. (author)

    Published in:

    Publication date :

    1974


    Size :

    , 8 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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