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Acoustical Properties of Fiberglass Blankets Impregnated with Silica Aerogel

Department of Mechanical Engineering, The University of Sheffield, Sheffield S1 3JD, UK
Author to whom correspondence should be addressed.
Academic Editor: Edoardo Piana
Appl. Sci. 2021, 11(10), 4593;
Received: 23 April 2021 / Revised: 12 May 2021 / Accepted: 14 May 2021 / Published: 18 May 2021
(This article belongs to the Special Issue Acoustic Properties of Absorbing Materials)
It is known that aerogel impregnated fibrous blankets offer high acoustic absorption and thermal insulation performance. These materials are becoming very popular in various industrial and building applications. Although the reasons for the high thermal insulation performance of these materials are well understood, it is still largely unclear what controls their acoustic performance. Additionally, only a small number of publications to date report on the acoustical properties of fibrous blankets impregnated with powder aerogels. There is a lack of studies that attempt to explain the measured absorption properties with a valid mathematical model. This paper contributes to this knowledge gap through a simulation that predicts the measured complex acoustic reflection coefficient of aerogel blankets with different filling ratios. It is shown that the acoustic performance of a fibrous blanket impregnated with aerogel is generally controlled by the effective pore size and porosity of the composite structure. It is shown that there is a need for refinement of a classical Biot-type model to take into account the sorption and pressure diffusion effects, which become important with the increased filling ratio. View Full-Text
Keywords: acoustics; aerogels; modeling; fiber; porous materials acoustics; aerogels; modeling; fiber; porous materials
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MDPI and ACS Style

Begum, H.; Horoshenkov, K.V. Acoustical Properties of Fiberglass Blankets Impregnated with Silica Aerogel. Appl. Sci. 2021, 11, 4593.

AMA Style

Begum H, Horoshenkov KV. Acoustical Properties of Fiberglass Blankets Impregnated with Silica Aerogel. Applied Sciences. 2021; 11(10):4593.

Chicago/Turabian Style

Begum, Hasina, and Kirill V. Horoshenkov 2021. "Acoustical Properties of Fiberglass Blankets Impregnated with Silica Aerogel" Applied Sciences 11, no. 10: 4593.

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