In order to obtain data for environmental impact assessment of noise from an airport under development, an MLS test-signal (Maximum Length Sequence) was emitted from a fixed point at the site on the sea and received on the seacoast about 5 km from the source. The measuring system was operated automatically, and the measurements were carried out at every hour and continued for 14 months. The MLS correlation method was applied in order not to annoy the people near the site, since the method succeeded in sound propagation measurements with signal levels lower than the background noise level. During the measurements, some meteorological conditions were also observed simultaneously.


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    Title :

    Long time measurement of long range sound propagation over an ocean surface


    Additional title:

    Langzeitmessungen der Schallausbreitung über eine Meeresoberfläche


    Contributors:
    Konishi, K. (author) / Tanioku, Y. (author) / Maekawa, Z. (author)

    Published in:

    Applied Acoustics ; 61 , 2 ; 149-172


    Publication date :

    2000


    Size :

    24 Seiten, 23 Bilder, 2 Tabellen, 20 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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