QUIESST database of European NRD

In-situ/laboratory correlation for sound reflection/absorption for concrete barriers

The diagram shows the correlation between measurement results of the laboratory method for sound absorption and the in-situ method for sound reflection considering concrete barriers only. This correlation is based only on cases where both methods have been used for testing the same barrier. The frequency range where the data were available is specified for each method in the diagram title. The formula of the linear regression is also shown in the diagram. Due to the relatively small number of cases for which results from both methods were available the linear regression cannot represent a robust relation for each barrier material separately. To establish such a relation more data would be needed.

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