Ground reflections and lateral attenuation due to refraction and scattering are two effects of acoustic propagation that can strongly influence noise received by an observer. Software that predicts community aviation noise can be reliant on ground reflection models to predict noise at receivers. However, empirical lateral attenuation models often include the influence of ground reflections implicitly, so a double-bookkeeping error can exist if one is used together with a reflection model. An accounting method that reconciles this bookkeeping issue for the Chien and Soroka reflection model and a Society of Automotive Engineers lateral attenuation model is presented. Importance to emerging supersonic civil aircraft is discussed.


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    Title :

    Simultaneous Use of Ground Reflection and Lateral Attenuation Noise Models


    Contributors:
    Jeff Berton (author)

    Conference:

    AIAA Aviation 2021 ; 2021 ; Virtual, US


    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English