Juricka M., Vasina M., Lapcik, Jr. L.

Study of the sound attenuation by means of Kund´s tube measurements (in the frequency range 16 to 6300 Hz) as well as the vibration damping (in the frequency range 50 – 2500 Hz) are related with the structural material characteristics such as mechanical tensile modulus, free voids volume and porosity. Effect of the mutual sandwich combination of selected materials interconnected by suitable bonding agents or by simple mechanical contacts will be judged with respect to the transmission of the whole structural element. Obtained experimental results of both acoustic performance and vibration damping will be generalized by means of empirical equations and will be interconnected with selected material mechanical and geometrical characteristics.