International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

Cenospheres are used in a variety of applications, including as fillers in building, construction, plastic, and composite materials. The aim of this paper is to evaluate the effect of particle size on the mechanical-acoustic properties of cenosphere powders, which were produced in two different sizes. The mechanical-acoustic properties of the studied powders were experimentally determined based on the frequency dependencies of the sound absorption coefficient, using the transfer function method. It can be concluded that not only particle size, but also powder bed height and the excitation frequency of acoustic waves, significantly influenced the mechanical-acoustic properties of the studied cenospheres.