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- W2045393472 abstract "Abstract This paper presents a method of identifying the acoustical characteristics of a ground surface. The unknowns are determined from sound-level measurements at a few points (5 or 6) on the ground. The algorithm used is based upon the least-squares minimization. A local reaction model of the ground surface is used, and hence the ground is characterized by one complex parameter, the specific normal impedance. Two types of ground have been studied; a comparison between theoretical and experimental results is presented. It shows the efficiency of the method and the validity of the ground model chosen. The validity of an impedance model depending on frequency is also examined, by using the same series of measurements and the impedance values obtained. This kind of impedance model simplifies the experimental and sometimes the computational conditions of the identification method but the comparison between numerical and experimental sound levels shows that a one parameter impedance model is not satisfactory for any type of ground." @default.
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- W2045393472 date "1985-05-01" @default.
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- W2045393472 title "Identification of the acoustical properties of a ground surface" @default.
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- W2045393472 doi "https://doi.org/10.1016/0022-460x(85)90413-4" @default.
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