The problem of the dynamic characterisation of a visco-elastic material is addressed, with reference to products and applications that are typical of cabin floors on board of ships. The phenomenon under consideration is the reduction in the airborne noise radiation in a cabin achieved by means of a visco-elastic layer interposed between the deck and the inner floor. The surveyable variables for the description of the phenomenon are reviewed and the physical meaning of the quantities that can be defined with them is discussed. A description is presented of different experimental methodologies applied to simple specimens in order to characterise the material by itself and in particular applications.
ALCUNE NOTE SULLA CARATTERIZZAZIONE DELLE PRESTAZIONI ACUSTICHE DI MATERIALI VISCOELASTICI DA IMPIEGARSI NELLE PAVIMENTAZIONI NAVALI
CARRERA, GIOVANNI;RIZZUTO, ENRICO
1995-01-01
Abstract
The problem of the dynamic characterisation of a visco-elastic material is addressed, with reference to products and applications that are typical of cabin floors on board of ships. The phenomenon under consideration is the reduction in the airborne noise radiation in a cabin achieved by means of a visco-elastic layer interposed between the deck and the inner floor. The surveyable variables for the description of the phenomenon are reviewed and the physical meaning of the quantities that can be defined with them is discussed. A description is presented of different experimental methodologies applied to simple specimens in order to characterise the material by itself and in particular applications.
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