بررسی ضریب جذب صدا در نانوکامپوزیت های آلومینیوم

Abstract Background Sound is one of the most important work-related risk factors and most widespread physical factors threatening the health of workers. Almost one of the best ways to control the sound, is sound absorber. Due to the extensive entrance nano in various fields of science one their applications design and use sound-absorbing panels containing nanoparticles.The aim of this study to determine the sound absorption coefficient of nanocomposites, containing aluminum nanoparticles at different percentages. Methods This study had an experimental – Laboratory procedure. First of aluminum particles (100 nm), wood chips and glue polyvinyl acetate weight was measured the ratio of identified and wellmixed. In the next step, the obtained mixture is poured into the mold Heat resistant and transferred to 37 ° C. After the preparation ofmentionednanocomposites then sound absorption coefficient values were determined by acoustic impedance tube at four frequencies, 250, 500, 1000 and 2000 Hz. Results The Comparison between the sound absorption coefficient of four weight percentage (1, 2, 3 and 4% of 100nm-aluminum nanoparticles) of aluminum indicated thatthealuminum nanocomposite had the highest sound absorption coefficient of weight percentage 4% at frequencyof 2000 HZ. While theallweight percentagesaluminumnanocomposites was seen the lowest sound absorptioncoefficient at frequency of 500 Hz. Conclusion The results showed that the increasing of the percentage of aluminum nanoparticles led to increase of sound absorption coefficient and aluminum nanocomposite can be a good choice to reduce environmental and industrial noise.