Sound-absorbing materials are widely used in industrial production. Inorganic fiber sound-absorbing materials have advantages such as a light weight and aging resistance, but the fibers are fine and brittle, which are not resistant to high temperatures, and are easy to be broken. Although foamed glass-aluminum materials are non-flammable and have good weather resistance, their mass is relatively heavy. In order to synthesize the sound absorption and physical properties of sound-absorbing materials, the noise reduction performance of the composite structure of those materials was analyzed. In this paper, honeycomb holes were fabricated from an aluminum foam sound-absorbing material, with their inside filled with felt materials to form a composite sound-absorbing structure. According to the simulation method of an impedance tube based on the COMSOL Multiphysics platform, the acoustic model of the impedance tube and specimens was established using Solidworks 3D modeling software. Through a Delany-Bazley-Miki acoustic model simulation, the sound absorption performance of the composite structure was measured, and the sound absorption coefficient of the new-structural sound-absorption material was obtained. The influence of single and compound sound-absorbing materials on the calculation of sound absorption coefficient was analyzed through simulation, and the mechanism of noise reduction was also analyzed. © 2025 Institute of Noise Control Engineering.
Hou et al. (Mon,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: