Acoustical performance characterization of resilient materials used under floating floors in dwellings

Acoustical performance and mechanical properties of different types of resilient underlayer, used in floating floors, are investigated on the basis of apparent dynamic stiffness measurement, compressibility and compressive creep and of laboratory measurement of the reduction of transmitted impact noise. Determining and quantifying resilient underlayers properties with time, on the basis of evaluation of thickness under load and behaviour under compression, is the aim of this study. The measurement and analysis methodologies of the macroscopical mechanical behaviour, although in first approximation, allow useful knowledge of acoustical performances of resilient materials used under floating floors.