Enhanced Sound Absorption Properties of Ceramics with Graphene Oxide Composites

Abstract

Noise pollution is acknowledged as the main environmental problem and is as harmful to human physical and mental health as water and air pollution. However, the acoustic properties of traditional sound absorption materials in low frequency ranges still need to be improved. Herein, the low-frequency sound absorption coefficient of porous ceramics was further improved by coating a graphene oxide (GO) and styrene-butadiene rubber (SBR) composite film inside the porous ceramics. The improved sound absorption coefficient of the porous composite reached 30.4% in the range of 200–800 Hz, which is attributed to the enhancement of the thermal viscous effect and the extension of the dissipation mechanism. Predictably, designing the morphology of three-dimensional interconnected porous structures on the microscale is comparatively useful for developing a porous sound absorbing material effective in middle- and low-frequency noise.

Innovative sound absorption technique: Step‐shaped ceramic fiberboards with veneer attachment for walls

“…However, the SAC gradually decreased in higher frequency ranges. This reduction can be attributed to the limited ability of high‐frequency sound to penetrate the porous structure of the sample, resulting in weaker absorption at those frequencies 40,47,48 …”

“…This reduction can be attributed to the limited ability of high-frequency sound to penetrate the porous structure of the sample, resulting in weaker absorption at those frequencies. 40,47,48 The veneer attached to the surface is assumed to reflect the energy of the vertical incident sound, which is why the sound absorption rate drops (VCFB, Figure 4B) with frequency and in the frequency range exceeding 2000 Hz (VCFBS). Additionally, Table 2 tion coefficient (NRC), sound absorption average (SAA) at 1/3 octave bands, and the average value of SAC in the 1/2 Octave frequency range.…”

Conductive Three-Dimensional Lamella Network for Improved Sound Absorption and Heat Transfer

“…Among various 3D porous networks, melamine foam (MF) is widely used as a sound-absorbing material due to its easy handling, facile introduction into a device, and high mechanical stability . Specifically, research is continuously being conducted to improve the absorption of sound frequency by introducing melamine surface changes of various scales (nanometers to micrometers), adjusting the porosity and curvature of the structure. − Losic et al introduced graphene oxide into the melamine skeleton to form a lamellar network structure, improving the sound absorption performance and mechanical stability of MF . In addition, various methods have been proposed to improve the thermal conductivity of 3D porous structure.…”