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F. Dolezal, M. Teibinger, T. Bednar:
"Flanking Transmission Of Impact Noise At Solid Wood Structures";
Vortrag: World Conference on Timber Engineering (WCTE 2010), Riva del Garda, Italy; 20.06.2010 - 24.06.2010; in: "Wcte 2010 - Cd1", (2010), 7 S.

Since solid wood constructions are more frequently applied for multi storey residential buildings the
demand for reliable prediction of sound insulation is increasing. Prediction is carried out following EN 12354 which,
however, does not contain any input data for solid wood constructions. Therefore, sound- and vibration measurements
were realized on solid wood test facilities where flanking transmission and input data for standardized predictions are
acquired. The normalized impact sound pressure level is calculated for different flexible interlayers and compared to the
results of the measurements. Single number quantities show satisfactory accordance between measurement and
prediction with deviations between 0 and 2 dB. Considering frequency dependent values major deviations, which can be
detected in a certain frequency range, require more accurate modelling. In a further step transformation of results to the
building situation by implementing conventional fasteners, which are required for static reasons, was analyzed. Since
application of fasteners lead to partly significant deterioration of flanking insulation, optimized fasteners were searched
and their acoustic potential verified at test facilities. It could be shown, that acoustically optimized fasteners nearly do
not affect flanking insulation at all. A catalogue of verified constructions was published to enable quick estimation of
acoustic parameters of selected constructions, including flanking transmission.

Flanking transmission, impact sound, vibration reduction index, sound insulation, solid wood