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. 2022 Mar 29;12(7):1123. doi: 10.3390/nano12071123

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Several nanofiber aerogels for sound absorption. (a) Synthetic steps of FIBER NFAs; (b) Photographs of FIBER NFAs with several shapes; (c) Sound absorption coefficients of FIBER NFAs and commercial 3M TAI2047 nonwovens. Reprinted with permission from ref. [90]. Copyright 2014 Springer Nature. (d) Fabrication process of RNFAs; (e) Microstructure of RNFAs; (f) Sound absorption coefficient of RNFAs with different densities. Reprinted with permission from ref. [91]. Copyright 2019 Royal Society of Chemistry. (g) Fabrication of NFAs; (h) Sound absorption mechanism of PAN-CNC40; (i) Sound absorption coefficients of the PAN-CNC40 and the commercial fibrous sound absorption felt. Reprinted with permission from ref. [38]. Copyright 2021 Elsevier.

Several nanofiber aerogels for sound absorption. (a) Synthetic steps of FIBER NFAs; (b) Photographs of FIBER NFAs with several shapes; (c) Sound absorption coefficients of FIBER NFAs and commercial 3M TAI2047 nonwovens. Reprinted with permission from ref. [90]. Copyright 2014 Springer Nature. (d) Fabrication process of RNFAs; (e) Microstructure of RNFAs; (f) Sound absorption coefficient of RNFAs with different densities. Reprinted with permission from ref. [91]. Copyright 2019 Royal Society of Chemistry. (g) Fabrication of NFAs; (h) Sound absorption mechanism of PAN-CNC40; (i) Sound absorption coefficients of the PAN-CNC40 and the commercial fibrous sound absorption felt. Reprinted with permission from ref. [38]. Copyright 2021 Elsevier.