Hybrid sound-absorbing foam materials with nanostructured grit-impregnated pores. (October 2018)

• Record Type: Journal Article
• Authors: Bardakhanov, S.P.; Lee, C.-M.; Goverdovskiy, V.N.; Zavjalov, A.P.; Zobov, K.V.; Chen, M.; Xu, Z.H.; Chakin, I.K.; Trufanov, D.Yu.
• Is Part Of: Applied acoustics. Volume 139(2018)
• Page Start: 69
• Page End: 74
• Publication Date: 2018-10
• Subjects: Sound protection -- Sound absorbent -- Passive absorber -- Absorption ratio -- Low-frequency absorption -- Transmission loss -- Foam -- Porous material -- Nanopowder -- Nanosilica -- Nanomagnetite -- Nanopores -- Nanoporous material; Acoustical engineering -- Periodicals; Periodicals; 620.2
• DOI: 10.1016/j.apacoust.2018.04.024
• Languages: English
• ISSNs: 0003-682X

Abstract

Abstract: A new approach to the design of sound-absorbing materials was experimentally investigated. Improved acoustic properties were obtained in a wider frequency range through the impregnation of nanoporous grit into foam pores. Using this approach, the range of efficiency of these materials was extended from high frequencies of 2.0–6.3 kHz to a lower band of 0.5–1.6 kHz. The absorption ratio was increased by 60–100%, and the transmission loss was increased by 20–22 dB.