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The beauty of a violin's sound, apart from the skill of the musician, depends on many other factors. the characteristics of the wood from which it is built, the shape and size of its body, i.e. the resonant box, the length of the neck or strings, the varnish it is varnished with...As for the material, elasticity is a key property that enables vibration and propagation of disturbances in the form of progressive waves. Longitudinal disorder in a solid body is caused by the action of an external force, for example by the friction of a bow against a violin string. Depending on the frequency of the tone being played, the violin's sound box oscillates in different patterns. In this paper, we examined how plates made of different materials vibrate at different frequencies. Relatively thin violin-shaped panels made of aluminum, wood and Plexiglas. The plates are set to vibrate with the help of a frequency generator. When we cover the board with fine sand, the formation of standing waves on the board creates interesting shapes known as Chladni figures. Nodal lines form in areas of the board that do not oscillate. Small sand particles are collected in these places so that when the plate is vibrated, these nodal lines are easily visualized. In this way, we found out whether it really matters what material the violin's soundboard is made of, or what effect the material has on the formation of standing waves. In addition to the experiment, a computer simulation was made using MATLAB with the aim of comparing the obtained samples by physical means and simulation. [ABSTRACT FROM AUTHOR]