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Transportation activities are a source of noise in the urban environment. The urgency of reducing noise caused by transportation in residential areas has led to the development of new sound barrier mo...dels. In this study, we present a novel sound barrier model with a sonic crystal structure for attenuating noise due to road transportation activity. The sonic crystal structure used in this study comprised a PVC tube with a diameter of 16.5 cm (6 inches) and a height of 4 meters. The measurement of noise attenuation was conducted by carrying out a full-scale experiment with a square lattice-critical sonic model. The proposed model was based on a combination of experimental and numerical approaches, using finite element analysis in ANSYS. The experimental study was conducted to measure the maximum noise reduction and insertion loss in the frequency range of 12.5 to 20,000 Hz. The results show a maximum noise reduction of 20.98 dB and an insertion loss of 2.5 dB (A), indicating the effectiveness of the proposed sound barrier model. A numerical simulation using finite element analysis in ANSYS was performed to investigate the sound attenuation behavior of the sonic crystal structure with respect to different frequency ranges. The simulation results show that the proposed model effectively attenuated high-frequency sound waves in the range of 1000 to 8000 Hz. The results suggest that the proposed sound barrier model with a sonic crystal structure could be an effective solution for reducing transportation noise in residential areas, and further research could explore the application of the model in other noise pollution scenarios.show more
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p2142-2153