Abstract
Noise pollution is a negative factor that affects our environment. It is, therefore, necessary to take appropriate measures to minimize it. This article deals with the sound absorption properties of open-porous Acrylonitrile Butadiene Styrene (ABS) material structures that were produced using 3D printing technology. The material’s ability to damp sound was evaluated based on the normal incidence sound absorption coefficient and the noise reduction coefficient, which were experimentally measured by the transfer function method using an acoustic impedance tube. The different factors that affect the sound absorption behavior of the studied ABS specimens are presented in this work. In this study, it was discovered that the sound absorption properties of the tested ABS samples are significantly influenced by many factors, namely by the type of 3D-printed, open-porous material structure, the excitation frequency, the sample thickness, and the air gap size behind the sound-absorbing materials inside the acoustic impedance tube.
Highlights
Noise pollution currently has a major impact on the environment, human health, and the economy.In general, noise control includes active and passive management [1]
This review describes the process of sound absorption and the predictive behavioral models of porous materials that are characterized by their sound-absorption properties, and analyses the development of the principles for designing foams and fibrous sound-absorbing materials, including their production
For the Acrylonitrile Butadiene Styrene (ABS) sample with a thickness t = 10 mm placed at a distance of 75 mm from the solid wall, a noise reduction coefficient NRC = 0.235 was observed for the ABS sample produced with the Starlit structure
Summary
Noise pollution currently has a major impact on the environment, human health, and the economy. The goal of their research was to develop a numerical method to appropriately distribute the solid elements in a layer of a porous structure with a constant thickness so that the noise would be completely absorbed. The results of the finite element-based numerical method showed that different types of resonances appear in the optimized layer, which absorbs noise for all considered frequencies simultaneously. The authors invented lowThesesingle-phase lattice structures rich resonances to induce abnormal effects, as specified by the density superlens which can reach a sound focus over the diffraction limit. Have been related tohave the sound of porous materials, the proposed types of structures (produced from an ABS material) have not yet been investigated
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