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acoustic insulation
Also known as: acoustic insulating materials, acoustic insulator
Facts (10)
Sources
Recent breakthroughs in the valorization of lignocellulosic biomass ... pubs.rsc.org Jun 7, 2025 10 facts
measurementFor multipurpose applications of aerogels, such as thermal insulation, acoustic insulation, and fire-retardancy, a 0.5–2 wt% suspension of cellulose pulp or fibers is typically used.
claimAcoustic insulation is defined as protection from sound pollution.
imageThe figure 16 in the source document displays various processes and results: (a) isolation of cellulose nanocrystals (CNC) from tunicate via acid hydrolysis, (b) surface modification of CNC via silylation, (c) ball-milling of red mud, (d) freeze-drying, (e) cross-linking of composite aerogels using hexamethylene diisocyanate (HDI), (f) sound absorption coefficient (SAC) of composite aerogels, (g) schematic of thermal and acoustic insulation mechanisms in red mud composite aerogels, (h) schematic of lignin-cellulose gel formation using BMIMCl, (i) sound-absorbing performance testing, and (j) set-up for quantifying SAC.
referenceJ. Feng, D. Le, S. T. Nguyen, V. Tan Chin Nien, D. Jewell, and H. M. Duong developed silica–cellulose hybrid aerogels specifically for thermal and acoustic insulation applications.
claimHempcrete possesses high density (600–1000 kg m−3), low thermal conductivity, acoustic insulation, vapour permeability, low energy demands, and CO2 adsorbing capacity, making it a potential replacement for regular Portland cement.
claimIdeal acoustic insulating materials are porous, lightweight, and elastic, as these structures prevent the heavy connection of constituent atoms required for sound transmission.
claimZhu et al. observed that the combination of ultra-low density, high porosity, and the presence of inorganic red mud particles in their fabricated material acted as a natural barrier to thermal and acoustic waves, resulting in superior insulating properties.
referenceX. Li, Z. Yang, K. Li, S. Zhao, Z. Fei, and Z. Zhang prepared a flexible silica aerogel with thermal and acoustic insulation properties using a water solvent system.
claimFaustino et al. developed a corn cob particleboard for use as an acoustic insulator.
claimSilica aerogel is used for thermal and acoustic insulation properties.