| In the present day, not only air and water pollution are the daily problems, but the sound pollution caused by various conditions is very difficult to avoid. Noise or sound pollution can cause various impacts on human health, such as tending to have high blood pressure irritable, easily tired, even suffering from permanent hum. The emergence of noise problems in this advanced technological era, led to the emergence of a lot of research in noise control at some places. The most commonly used way of controlling noise is the installation of porous material. Due to this, the problem formulation to obtain the value of sound absorption coefficient from porous material through the calculation of impedance tube model with finite element method. The goal is to find the best porous material with high sound absorption coefficient value, especially in absorbing sound at high frequency (500 Hz-). To obtain the sound absorption coefficient value of the porous material through the calculation of the impedance tube model with this finite element method, ACTRANVI software is used to view the phenomenon of sound absorption from porous material to the frequency of 500-6.300 Hz. The types of porous material to be tested are porous materials with Modulus Young 1,000, 10,000, 100,000, 1,000,000 and 10,000,000 N/m. Each material will be tested using spring rigidity of 1 N/m (free frame) material and 10,000 N/m (rigid frame). And from the best will be varied again with flow resistivity of 4,600, 46,000, 460,000 and 4,600,000 Ns/m 4. Based on the results of the calculation, it was found that porous materials with Young Modulus value 10.000.000 N/m, spring stiffness 10.000 N/m, and airflow resistivity 46.000 Ns/m 4 is the best porous material to absorb sound with high frequency. This is because the porous material has the highest average sound absorption coefficient value compared to other porous materials. |