Tehran University of Medical Sciences International Journal of Occupational Hygiene 2008-5109 15 1 2025 12 08 12 21 Marzieh Kazempour School of public Health, Hormozgan University of Medical Sciences, Bandarabbas, Iran Yaser Mokhayeri Cardiovascular Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran 2025 07 11 2025 07 27 Background: Absorption of low- to mid-frequency (LMF) noise has been challenging because of the inherently poor dissipation of classical noise-absorbing materials. For decades, the effective absorption of LMF noise has been an important topic and has attracted considerable interest from scientists in physics and engineering circles. Method: This systematic review was conducted to assess the performance of LMF noise absorbers while considering influencing factors. Literature databases, including Scopus, Web of Science, IEEE, and Science Direct, were searched. In addition to the bibliographic sources, key publications and journal databases were searched from 2000 to 2022. Twenty studies were selected on the basis of the inclusion criteria. The data from the papers were analyzed via plot digitizer software. Results: The results indicated that, with the exception of two factors resistivity and inner diameter the other factors positively affected the performance of low- to mid-frequency (between 40 and 1000 Hz) noise absorbers. With an increase in the number of layers, the absorption coefficient decreased by 0.06. In addition, increasing the surface porosity and thickness significantly increased the absorption coefficient at low to mid frequencies (0.16). By increasing the fiber gap, the absorption coefficient increased significantly by 0.06. Conclusion: Among the various factors, the porosity, thickness, air gap, fiber gap, perforated plate, and mass had the most significant effects on the performance of the noise absorbers.   https://ijoh.tums.ac.ir/index.php/ijoh/article/view/703 https://ijoh.tums.ac.ir/index.php/ijoh/article/download/703/852