Study of noise directivity at household air conditioning installations

This paper presents the experimental determination in various operating modes of noise directivity at household air conditioning installations. To conduct the experimental study a measurement stand was built inside the a...

NONLINEAR APPROACH OF THE SYSTEMS BETWEEN THE DYNAMIC MODELLING DIFFICULTIES AND THE ADVANTAGES OF USING IT IN MECHANICAL DESIGNING

Analysis of the Sound Field in Enclosures

Steady-state sound field in closed spaces may be calculated as a series of normal modes of oscilatings. Experimental results are not explained completely by this theory and for these differences should be an additional t...

Considerations Regarding the Influence of the Mechanical Vibrations Upon a Dynamic System Used in Tobacco Industry

The paper analyses, from the point of view of the mechanical vibrations, the apparatus of transporting and drying of tobacco leaves. The technical literature studies a reduced number of types of such apparatuses, which a...

Evaluation of the Dissipated Energy in Viscoelastic or Hysteretic Seismic Isolators

This paper represents the result of experimental and theoretical researches concerning the behaviour and the performance level specific to neoprene bearings subjected to conformity assessment. The tandardized test involv...