| Zugriffsnummer | 28799 |
| Dokumenttyp | Konferenzartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Radiation efficiencies of timber joist ceilings |
| Autor(in); Institution |
Schmidt, Jan-Henning; 1.7, Akustik und Dynamik, PTB-Braunschweig
Wittstock, Volker; 1.7, Akustik und Dynamik, PTB-Braunschweig
Langer, Sabinw; TU Braunschweig, Braunschweig, GERMANY
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| Quelle/Jahr | AIA-DAGA 2013 : proceedings of the International Conference on Acoustics:(2013), 826 - 829 |
| Availability | [CD-ROM] ; file name: 000084.pdf |
| ISBN | 978-3-939296-05-8 |
| Verlag | Berlin: DEGA |
| Konferenzangaben | AIA-DAGA 2013, International Conference on Acoustics, including the 39th German Annual Conference on Acoustics, Merano, 18-21, March, 2013, Italy |
| Freie Schlagworte | Compact measurement setup ; radiation efficiencies ; timber joist ceilings ; in-situ |
| Zusammenfassung | A compact measurement setup was developed 2009 in the course of an AIF-funded project to determine the impact sound reduction with a small setup (1.2m x 0.8m x 0.2m) which replaces the special test facility according to ISO 10140. For concrete- and timber joist ceilings, the determination of the impact sound reduction at a compact measurement setup worked quite well. In the frame of another AIF-funded project which started in 2011, the possibility to determine the normalised impact sound pressure level at a compact measurement setup is investigated. For this determination, the radiation efficiency of the investigated timber joist ceiling has to be known. Radiation efficiencies of multiple timber joist ceilings determined in-situ and under laboratory conditions are compared. For the determination, the radiated sound power is measured by means of intensity scanning and of the averaged sound pressure level in the receiving room. A structural excitation by a tapping machine and an airborne excitation by a dodecahedron were applied successively. The structural velocity is measured by a scanning laser vibrometer. The resulting radiation efficiencies for the different excitations and the different methods to measure the radiated sound power are compared and discussed |
