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Correlation between post and element measurements of in-situ sound insulation for timber barriers

The diagram shows the comparison between sound insulation measurements performed in front of a post and measurements performed in front of a noise barrier element for timber barriers only. The analysis has been performed for the frequency range between 200 Hz and 5kHz and also considering a variable lower boundary. 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. However a general trend can be recognised.

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