The article is devoted to the study of the possibilities of using granules obtained from nanosized silicon dioxide powders as materials that absorb low-frequency acoustic vibrations. Granules with sizes from hundreds of microns to several millimeters were obtained from silicon dioxide by different methods and were classified by the sizes of the resulting granules. Some of the granules were solid, and some had open porosity with pores in the nanometer range, the volume of which was more than 50% of the granule volume. The granules were used as an independent layer of noise-absorbing material, as well as a modifier of traditional materials used in mechanical engineering. It was found that granulated nanoporous materials based on nanoparticles can significantly suppress acoustic vibrations at low frequencies.
Zobov et al. (Wed,) studied this question.
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