Sound absorption performance of porous metal fiber materials with different structures

Wang, Jianzhong; Ao, Qingbo; Ma, Jingling; Kang, X.T.; Wu, Chen; Tang, Huiping; Song, Weidong

doi:10.1016/j.apacoust.2018.10.014

Cited by 34 publications

(20 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We compared the sound absorption property of our SAC sponges with that of other sound absorption materials in terms of NRC and areal density ( Fig. 7d and Supplementary Table 2) 29,46,[48][49][50][51][52][53][54][55][56][57][58][59][60][61][62] . Our SAC sponges show lightweight characteristic and better sound absorption property.…”

Section: Resultsmentioning

confidence: 99%

Highly compressible and anisotropic lamellar ceramic sponges with superior thermal insulation and acoustic absorption performances

et al. 2020

View full text Add to dashboard Cite

Advanced ceramic sponge materials with temperature-invariant high compressibility are urgently needed as thermal insulators, energy absorbers, catalyst carriers, and high temperature air filters. However, the application of ceramic sponge materials is severely limited due to their complex preparation process. Here, we present a facile method for large-scale fabrication of highly compressible, temperature resistant SiO 2-Al 2 O 3 composite ceramic sponges by blow spinning and subsequent calcination. We successfully produce anisotropic lamellar ceramic sponges with numerous stacked microfiber layers and density as low as 10 mg cm −3. The anisotropic lamellar ceramic sponges exhibit high compression fatigue resistance, strain-independent zero Poisson's ratio, robust fire resistance, temperatureinvariant compression resilience from −196 to 1000°C, and excellent thermal insulation with a thermal conductivity as low as 0.034 W m −1 K −1. In addition, the lamellar structure also endows the ceramic sponges with excellent sound absorption properties, representing a promising alternative to existing thermal insulation and acoustic absorption materials.

show abstract

Section: Resultsmentioning

confidence: 99%

Highly compressible and anisotropic lamellar ceramic sponges with superior thermal insulation and acoustic absorption performances

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Based on the Johnson-Champoux-Allard model [20,21], complex effective density ρ(ω) and complex effective bulk modulus K(ω) of the single compressed porous metal could be obtained according to the derived structural parameters, as shown in Equations (4) and (5), respectively. Here, ω was the sound angular frequency, which could be calculated by Equation (6); ρ was the density of the air with normal temperature, 1.21 Kg/m 3 ; γ was the specific heat ratio of the air, 1.40; P 0 was the standard static pressure of the air, 1.013 •10 5 Pa; N u was the Nusselt number, 4.36; P r was the Prandtl number, 0.71 [15][16][17][18][19][20][21]. Meanwhile, j was the symbol of the imaginary number.…”

Section: Theoretical Modelingmentioning

confidence: 99%

“…Normally, sound absorption performance of the sound absorber with certain thickness is evaluated by the average sound absorption coefficient in the given frequency range, which indicates that the desired sound absorber must achieve a higher average sound absorption coefficient and utilize smaller total thickness simultaneously. Moreover, taking the practical applications into account, besides the outstanding sound absorption performance, the desired sound absorber should have the additional advantages of low fabrication cost, excellent fire resistance, fine environmental friendliness, convenient installability, and easy maintainability [6,7]. Therefore, these factors should be taken into consideration in developing the sound absorber for practical application.…”

Section: Introductionmentioning

confidence: 99%

Optimization and Validation of Sound Absorption Performance of 10-Layer Gradient Compressed Porous Metal

Yang

Shen

Bai

et al. 2019

Metals

View full text Add to dashboard Cite

Sound absorption performance of a porous metal can be improved by compression and optimal permutation, which is favorable to promote its application in noise reduction. The 10-layer gradient compressed porous metal was proposed to obtain optimal sound absorption performance. A theoretical model of the sound absorption coefficient of the multilayer gradient compressed porous metal was constructed according to the Johnson-Champoux-Allard model. Optimal parameters for the best sound absorption performance of the 10-layer gradient compressed porous metal were achieved by a cuckoo search algorithm with the varied constraint conditions. Preliminary verification of the optimal sound absorber was conducted by the finite element simulation, and further experimental validation was obtained through the standing wave tube measurement. Consistencies among the theoretical data, the simulation data, and the experimental data proved accuracies of the theoretical sound absorption model, the cuckoo search optimization algorithm, and the finite element simulation method. For the investigated frequency ranges of 100–1000 Hz, 100–2000 Hz, 100–4000 Hz, and 100–6000 Hz, actual average sound absorption coefficients of optimal 10-layer gradient compressed porous metal were 0.3325, 0.5412, 0.7461, and 0.7617, respectively, which exhibited the larger sound absorption coefficients relative to those of the original porous metals and uniform 10-layer compressed porous metal with the same thickness of 20 mm.

show abstract

“…The gradient-structural porous metal and the multilayer porous metal have been developed to further improve absorption efficiency and reduce total thickness [11,12,13,14,15]. Zhu et al [11] had prepared metal fiber porous material with gradient pore structures, and average sound absorption coefficient in the 50–6400 Hz for the optimal sample with thin-thickness of 3.0 mm reached 35%.…”

Section: Introductionmentioning

confidence: 99%

“…Cheng et al [14] had developed the various nickel foam-based multilayer sound absorbing structure, and the optimal sound absorption coefficient could reach 0.4 in 1000–1600 Hz range for the composite structure of five-layer foam with backed 5-mm-thick cavity. The porous metal fiber materials with gradient structure was fabricated by Wang et al [15], and its average absorption coefficient reached 37.52% in the 50–6400 Hz range when thickness of the three-layer gradient structure was 6 mm. It can be judged from this research that gradient and superposed porous metals will potentially realize high efficiency and thin thickness simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Gradient Compressed Porous Metal for High-Efficiency and Thin-Thickness Acoustic Absorber

et al. 2019

View full text Add to dashboard Cite

Increasing absorption efficiency and decreasing total thickness of the acoustic absorber is favorable to promote its practical application. Four compressed porous metals with compression ratios of 0%, 30%, 60%, and 90% were prepared to assemble the four-layer gradient compressed porous metals, which aimed to develop the acoustic absorber with high-efficiency and thin thickness. Through deriving structural parameters of thickness, porosity, and static flow resistivity for the compressed porous metals, theoretical models of sound absorption coefficients of the gradient compressed porous metals were constructed through transfer matrix method according to the Johnson–Champoux–Allard model. Sound absorption coefficients of four-layer gradient compressed porous metals with the different permutations were theoretically analyzed and experimentally measured, and the optimal average sound absorption coefficient of 60.33% in 100–6000 Hz was obtained with the total thickness of 11 mm. Sound absorption coefficients of the optimal gradient compressed porous metal were further compared with those of the simple superposed compressed porous metal, which proved that the former could obtain higher absorption efficiency with thinner thickness and fewer materials. These phenomena were explored by morphology characterizations. The developed high-efficiency and thin-thickness acoustic absorber of gradient compressed porous metal can be applied in acoustic environmental detection and industrial noise reduction.

show abstract

Sound absorption performance of porous metal fiber materials with different structures

Cited by 34 publications

References 9 publications

Highly compressible and anisotropic lamellar ceramic sponges with superior thermal insulation and acoustic absorption performances

Highly compressible and anisotropic lamellar ceramic sponges with superior thermal insulation and acoustic absorption performances

Optimization and Validation of Sound Absorption Performance of 10-Layer Gradient Compressed Porous Metal

Preparation and Characterization of Gradient Compressed Porous Metal for High-Efficiency and Thin-Thickness Acoustic Absorber

Contact Info

Product

Resources

About