Journal of Environmental Health and Sustainable Development

en Comparing Optimized Sound Absorption Coefficient of Aluminum Foam with Local Search Algorithm, Genetic Algorithm, and Particle Swarm Optimization Noise and radiation control Original articles <div style="text-align: justify;">Introduction: The principle of passive sound control is based on the phenomenon of sound absorption by absorbers. The factors affecting sound absorption include porosity, pore size, pore opening size, thickness, and air flow resistance. Materials and Methods: In this study, the authors compared the optimization results of the effective parameters on sound absorption coefficient (AC) using the three optimization methods: Guided Local Search (GLS), Genetic Algorithm (GA) and Particle Swarm Optimization (PSO). The programming was done in MATLAB software. Thicknesses of 5, 10, 20, 30 and 40 mm were chosen for optimization at frequencies of 500 to 3000 Hz. Results: In frequencies above 2 kHz (thickness 5 to 40 mm), the three optimal methods had the same performance and estimated AC of 1. At low frequencies of 2 kHz and thicknesses of 30 and 40 mm, GA and PSO methods obtained an AC of 1. Conclusion: It seems that the GA and PSO optimization algorithm are suitable methods to optimize the AC of metal foam in low and high frequencies.</div> Sound Absorption, High-Frequency, Low-Frequency,Optimization Algorithm. 2249 2256 http://jehsd.ssu.ac.ir/browse.php?a_code=A-10-270-2&slc_lang=en&sid=1 Rohollah Fallah Madvari 0000-0003-3112-6733 No Industrial Diseases Research Center, Department of Occupational Health Engineering, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran Mohsen Niknam Sharak mohsen.niknam@gmail.com 0000-0002-3114-6278 Yes PhD Graduate in Mechanical Engineering, University of Birjand, Birjand, Iran Mohammad Javad Jafari 0000-0001-7283-4299 No Department of Occupational Health Engineering, School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran Faezeh Abbasi Balochkhaneh 0000-0002-2665-3347 No Department of Occupational Health Engineering, School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran