Sound absorption performance of a filled honeycomb composite structure

Xie, Suchao; Yang, Suqing; Yang, Chengxing; Da, Wang

doi:10.1016/j.apacoust.2019.107202

Cited by 57 publications

(21 citation statements)

References 25 publications

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“…Simultaneously, the airflow resistance of the sandwiched FCNSs (4.9 × 10 6 Pa s m −2 ) was between FCNS-5 (1.8 × 10 6 Pa s m −2 ) and FCNS-18 (11.3 × 10 6 Pa s m −2 ) (Fig. 5h), which was proportional to the sample density 60,61 . Moreover, the corresponding specific acoustic impedance had also been calculated, where the real (Re [Z]) and imaginary (Im [Z]) parts represented the transmission resistance and inertial acoustic resistance of sound waves, respectively (see Fig.…”

Section: Resultsmentioning

confidence: 92%

Flexible ceramic nanofibrous sponges with hierarchically entangled graphene networks enable noise absorption

et al. 2021

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Traffic noise pollution has posed a huge burden to the global economy, ecological environment and human health. However, most present traffic noise reduction materials suffer from a narrow absorbing band, large weight and poor temperature resistance. Here, we demonstrate a facile strategy to create flexible ceramic nanofibrous sponges (FCNSs) with hierarchically entangled graphene networks, which integrate unique hierarchical structures of opened cells, closed-cell walls and entangled networks. Under the precondition of independent of chemical crosslinking, high enhancement in buckling and compression performances of FCNSs is achieved by forming hierarchically entangled structures in all three-dimensional space. Moreover, the FCNSs show enhanced broadband noise absorption performance (noise reduction coefficient of 0.56 in 63–6300 Hz) and lightweight feature (9.3 mg cm–3), together with robust temperature-invariant stability from –100 to 500 °C. This strategy paves the way for the design of advanced fibrous materials for highly efficient noise absorption.

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Section: Resultsmentioning

confidence: 92%

Flexible ceramic nanofibrous sponges with hierarchically entangled graphene networks enable noise absorption

et al. 2021

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“…15, Table 2, and Supplementary Methods). 59 Obviously, the sound pressure drop of the GCNA-18 and sandwiched GCNAs (red to green color) was much greater than GCNA-5 (red to yellow color), which was consistent with the poor low-frequency absorption of GCNA-5. However, in contrast to the rapid drop in sound pressure of GCNA-18 as a consequence of its overlarge density and excessive re ections, the sound pressure of the sandwiched GCNA was generally high in the rst unit and then decreased continuously, indicating that more sound waves could enter and then were gradually consumed, which were consistent with high absorption coe cients of sandwiched GCNA.…”

Section: Resultsmentioning

confidence: 55%

Flexible Ceramic Nanofibrous Aerogels with Hierarchically Entangled Graphene Networks Enable Full-Frequency Noise Absorption

Zong

Cao

Yin

et al. 2021

Preprint

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Traffic noise pollution has posed a huge burden to the global economy, ecological environment, and human health. However, most present traffic noise reduction materials suffer from a narrow absorbing band, high weights, and poor temperature resistance. Here, we demonstrate a facile strategy to create flexible ceramic nanofibrous aerogels (GCNAs) with hierarchically entangled graphene networks, which integrate unique hierarchical structures of opened cells, closed-cell walls, and entangled networks. Under the precondition of independent of chemical crosslinking, high enhancement in buckling and compression performances of GCNAs is achieved by forming hierarchically entangled structures in all three-dimensional space. Moreover, the flexible GCNAs show striking full-frequency noise absorption performances (noise reduction coefficient of 0.56 in 63~6300 Hz) and lightweight features (9.3 mg cm-3), together with robust temperature-invariant stability in –100~500 °C. This strategy paves the way for the design of novel fibrous materials for highly efficient full-frequency noise absorption.

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“…Meanwhile, movement between adjacent mediator molecules can produce viscous and friction forces, causing the energy wave to be dissipated after being converted into thermal energy (Kishor and Pawar, 2019). Along with the advancement of materials science, more and more composite materials have also been applied in the field of noise and vibration absorption (Dunne et al, 2017;Yang and Sheng, 2017;Zhao et al, 2018;Yang et al, 2019;Xie et al, 2020). Carbon nanocomposites, such as carbon nanofibers, carbon nanotubes, and graphenes, have become the most promising vibration and noise absorption composites, owing to their favorable compatibilities, excellent sound and vibration absorption properties, and wide wave absorption frequency band.…”

Section: Vibration and Noise Reduction Based On The Property Of Soundmentioning

confidence: 99%

Carbon Nanomaterials: A New Sustainable Solution to Reduce the Emerging Environmental Pollution of Turbomachinery Noise and Vibration

Jia

Miu

et al. 2020

Front. Chem.

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The vibration and noise that resulted from turbomachinery, such as fans, compressors, and centrifugal pumps, are known to bring considerable disturbance and pollution to the machine itself, the environment, and the operators. Hence, how to cope with the vibration and noise has become a recent research focus. With the advancement of materials science, more and more new nanomaterials have been applied in the field of noise and vibration reduction. To be specific, carbon-based nanomaterials, such as carbon fibers, carbon nanotubes, and graphenes, have achieved outstanding results. Carbon nanocomposites, such as carbon nanofibers, carbon nanotubes, and graphenes, are characterized by their low densities, high strengths, and high elastic moduli, all of which made carbon nanocomposites the most promising vibration and noise-reduction composites, thanks to their damping properties, compatibilities, noise and vibration absorption qualities, and wide wave-absorbing frequency bands. In light of this, this paper summarizes the progresses and application prospects of such carbon nanocomposites as carbon nanofibers, carbon nanotubes, and graphenes in the field of turbomachinery vibration and noise reduction.

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Sound absorption performance of a filled honeycomb composite structure

Cited by 57 publications

References 25 publications

Flexible ceramic nanofibrous sponges with hierarchically entangled graphene networks enable noise absorption

Flexible ceramic nanofibrous sponges with hierarchically entangled graphene networks enable noise absorption

Flexible Ceramic Nanofibrous Aerogels with Hierarchically Entangled Graphene Networks Enable Full-Frequency Noise Absorption

Carbon Nanomaterials: A New Sustainable Solution to Reduce the Emerging Environmental Pollution of Turbomachinery Noise and Vibration

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