@inproceedings{Mayr2017, author = {Mayr, Andreas}, title = {Schallschutz mit der neuen DIN 4109, Was hat sich im Bauteilkatalog Trockenbau ge{\"a}ndert?}, series = {Das Forum 2017 - Zukunft Trockenbau Ausbau, Berlin, Deutschland, September 2017.}, booktitle = {Das Forum 2017 - Zukunft Trockenbau Ausbau, Berlin, Deutschland, September 2017.}, year = {2017}, abstract = {Die DIN 4109 regelt die Anforderungen an den Schallschutz in Geb{\"a}uden sowie den Nachweis der Einhaltung dieser Anforderungen. Im Juli 2016 erschien die komplett {\"u}berarbeitete und neu strukturierte „neue" DIN 4109. Im Vortrag werden wesentliche {\"A}nderungen, die neuen Rechenverfahren und die relevanten Bauteilkataloge kurz erl{\"a}utert. {\"A}nderungen, die sich speziell f{\"u}r die schalltechnische Planung und Ausf{\"u}hrung des Trockenbaus ergeben, werden anhand von praktischen Beispielen aufgezeigt. Damit soll ein Gef{\"u}hl f{\"u}r M{\"o}glichkeiten und Grenzen in der Anwendung der neuen Norm vermittelt werden.}, language = {de} } @inproceedings{GibbsMayr2008, author = {Gibbs, Barry and Mayr, Andreas}, title = {Structure-borne sound from machines in lightweight buildings.}, series = {15th International Congress on Sound and Vibration (ICSV15), July 2008, Daejeon, Korea}, booktitle = {15th International Congress on Sound and Vibration (ICSV15), July 2008, Daejeon, Korea}, year = {2008}, abstract = {A practical method is proposed for predicting the total structure-borne sound transmission from machines installed in lightweight buildings. The total structure-borne sound power is a function of the source activity and mobility, and the receiver mobility, at each contact and for each component of excitation. The data and computational requirements for prediction normally are large and are required to be in complex form for the cases where source mobility and receiver mobility are of the same magnitude. This can occur in lightweight framed buildings. However, manufacturers view their products as single entities and desire corresponding single values of source strength. They also desire simple measurement methods and the data obtained to be in octave or one-third octaves. A laboratory reception plate measurement procedure has been proposed which yields single equivalent values of source strength and source mobility. The source data, in combination with an estimate of the single equivalent value of receiver mobility, yields a simple prediction of the total installed power. The accuracy of the simple prediction depends on the spatial variation in contact conditions. For example, the receiver mobility over a joist is likely to be significantly lower than for positions between joists. Case studies are described for multiple contact sources on a timber-joist floor where the simple predictions are compared with exact values obtained from a full mobility formulation.}, language = {en} } @inproceedings{GibbsMayr2008, author = {Gibbs, Barry and Mayr, Andreas}, title = {Structure-borne sound transmission from machines into ribbed structures.}, series = {Acoustics 2008, Paris, France}, booktitle = {Acoustics 2008, Paris, France}, year = {2008}, abstract = {The total structure-borne sound power of an installed machine is a function of the source activity and mobility, and the receiver mobility, at each contact and for each component of excitation. The data and computational requirements for prediction therefore are large. Manufacturers view their products as single entities and desire corresponding single values of source strength. A laboratory reception plate measurement procedure has been proposed which yields single equivalent values of source strength and source mobility. The source data, in combination with an estimate of the single equivalent value of receiver mobility, yields the approximate total installed power. The accuracy of the estimate is dependent on the spatial variation in contact conditions over the connections. In addition, phase information has been lost in the simplification. Case studies are described for multiple contact sources on a non-homogeneous plate (a timber-joist floor) where the approximate estimates of structure-borne power are compared with exact values obtained from full mobility formulations.}, language = {en} } @inproceedings{MayrGibbs2008, author = {Mayr, Andreas and Gibbs, Barry}, title = {Approximation of single equivalent mobilities of timber joist floors.}, series = {Acoustics 2008, Paris, France}, booktitle = {Acoustics 2008, Paris, France}, year = {2008}, abstract = {To estimate the structure-borne sound power of vibrational active machines or components two source quantities, corresponding to the source activity and mobility, and one receiver quantity, the mobility, are usually required. A practical, laboratory-based measurement procedure for the characterisation of mechanical installations has recently been proposed, which yields single equivalent values of source strength and source mobility. In order to predict the power in the installed condition, an estimate of the receiver mobility also is required, again, for practical reasons, in the form of a single equivalent value. This paper considers the single equivalent receiver mobilities for lightweight building structures - timber joist floors. The value obtained is in the form of the average magnitude of the effective mobilities over the contact points. A simple prediction method is proposed for point- and transfer mobilities (both are required to yield the effective mobility at each contact) based on infinite beam and infinite plate behaviour. Estimates for point-, transfer- and single equivalent receiver mobilities are discussed and compared with measured data.}, language = {en} } @inproceedings{MayrGibbsFischer2008, author = {Mayr, Andreas and Gibbs, Barry and Fischer, Heinz Martin}, title = {Spatial variation of the point mobility of a timber joist floor}, series = {DAGA 2008, Deutsche Jahrestagung f{\"u}r Akustik, Dresden.}, booktitle = {DAGA 2008, Deutsche Jahrestagung f{\"u}r Akustik, Dresden.}, year = {2008}, language = {en} } @inproceedings{MayrNightingale2007, author = {Mayr, Andreas and Nightingale, T.R.T.}, title = {On the mobility of joist floors and periodic rib-stiffened plates.}, series = {Proceedings of Inter-Noise 2007 Istanbul, 36th International Congress \& Exhibition on Noise Control Engineering, Istanbul, Turkey, August 2007.}, booktitle = {Proceedings of Inter-Noise 2007 Istanbul, 36th International Congress \& Exhibition on Noise Control Engineering, Istanbul, Turkey, August 2007.}, year = {2007}, language = {en} }