A review on silica aerogel-based materials for acoustic applications

Silica aerogels are popular in terms of production volume and real-world applications. Although the current market growth rate is driven exclusively by thermal insulation, may also be attractive for acoustic applications with potential aiding sound absorption/insulation. This paper a summary acoustics related studies silica aerogel-based products. It introduces aerogels, some characterization methods, reviews systematically available data on absorption/insulation polymer-silica aerogel composites, nonwoven-silica blankets, renders/glazing. The work identifies areas where further research required, including experimental theoretical physics absorption mesoporous materials, more systematic standardized evaluations properties aerogel-composites. Aside from this call to action, opportunities barriers commercialization products presented.