Recent advances on nanofibrous acoustic materials for noise reduction applications

Abstract

Nanofibrous acoustic materials have gradually attracted more and more attentions in noise reduction applications. Significant progress has also been made concerning the fabrication of nanofibrous materials. The aim of this work is to provide a comprehensive review on recent advances on the acoustical properties of nanofibrous materials. In this review, studies on the sound absorption of nanofibrous membrane and 3D nanofibrous structure are summarized. Nanofibrous materials can effectively absorb the incident acoustic energy, due to its high surface area, unique porous structures, and suitable airflow resistivity. Laminated composites consist of different nanofibrous layers can efficiently increase sound absorption coefficients with reduced thickness and weight. Moreover, the low-weight aerogel embedded with nanofibers has also been considered as one of the most attractive materials for noise control and reduction. With the advantages of ultra-light weight and robust sound absorption, it has been proven to be promised potential alternative to commercial porous absorber.