POSSIBILITY OF USING POLYURETHANE MATERIALS TO REDUCE VIBRATIONS AND NOISE IN THE WORKING ENVIRONMENT

Noise and vibrations are physical factors, the impact of which on the employee may negatively affect their health.Therefore, it is extremely important to effectively reduce the negative impact of these factors by implementing solutions that reduce the risk.In the article the possibility of using selected porous materials (layer systems) in the frequency range from f = 100 Hz to f = 2500 Hz, is presented.In order to assess the suitability of the application of the developed layer system, tests were carried out to determine the physical sound absorption coefficient (Kundt's tube), as well as to assess the effectiveness of vibration damping by polyurethane materials in the form of a layer system.It was found that the developed layer system can be used to reduce vibrations and noise.The developed layer system was characterized by the desired sound absorption properties fr > 0.6, in addition to damping efficiency above 50%, especially in the range of f = 315 Hz -2500 Hz.The developed layered system took into account the frequency ranges characterized by the highest f values (f = 1000-2500 Hz) as well as the effectiveness, aimed at a permanent reduction in physical factors (noise, vibrations) in the case of design solutions focused on limiting the negative impact of these factors on employees' health.