Geometrical and Dimensional Optimization of Sound Absorbing Porous Copper with Cavity

Yang, Xiaocui; Peng, Kang; Shen, Xinmin; Zhang, Xiaonan; Bai, Panfeng; Xu, Pengjin

doi:10.1016/j.matdes.2017.06.029

Cited by 29 publications

(46 citation statements)

References 21 publications

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“…By data processing and theoretical analysis, sound absorption coefficients of the samples could be achieved. According to the measurement principle of the AWA6128A detector, measurement of the sound absorption coefficients of the porous Ni-Fe required samples with two sizes, diameters of which were 96 mm and 30 mm, respectively [10]. The samples with a diameter of 96 mm were used in the measurements with the low frequency band from 90 Hz to 2075 Hz, and those with a diameter of 30 mm were used in the measurements with the high frequency band from 1500 Hz to 6640 Hz.…”

Section: Measurement Of Sound Absorption Coefficients At Normal Incidmentioning

confidence: 99%

“…For example, the detected thickness of 12 mm consisted of three pieces of the 4 mm compressed samples in the experimental serial 1003. The influence of gaps in different combinations of single samples was investigated and evaluated, and the results indicated that the influence of gaps in the combination process was inconspicuous [10]. …”

Section: Measurement Of Sound Absorption Coefficients At Normal Incidmentioning

confidence: 99%

“…Chevillotte et al [8] and Venegas et al [9] studied the effects of the three-dimensional microstructure on the sound absorption of foams, and the transport and sound absorption properties were numerically studied as a function of throat size, pore size, and sample thickness. Yang et al [10] and Kino [11] modified the Johnson-Allard model by introducing a correction factor, which could efficiently improve the prediction accuracy of the sound absorption coefficient of the porous metal. In this study, the sound absorption coefficient of the porous Ni-Fe alloy with a compression ratio from 0% to 80% at an interval of 10% was obtained according to the standing wave method [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…In this study, the sound absorption coefficient of the porous Ni-Fe alloy with a compression ratio from 0% to 80% at an interval of 10% was obtained according to the standing wave method [12,13]. In order to quantificationally analyze influences of the compression ratio, the sound absorption coefficient of the porous Ni-Fe with a different compression ratio at the same thickness of 20 mm was calculated based on the modified Johnson-Allard model [10,[14][15][16]. Afterwards, section morphologies of the compressed samples were studied with scanning electron microscopy (SEM), which could qualitatively explain influences of the compression ratio on the sound absorption performance of the porous Ni-Fe alloy.…”

Section: Introductionmentioning

confidence: 99%

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Influences of Compression Ratios on Sound Absorption Performance of Porous Nickel–Iron Alloy

Bai

Shen

Zhang

et al. 2018

Metals

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Abstract:The improvement of sound absorption performance of porous metal is a focus of research in the field of noise reduction. Influences of compression ratios on sound absorption performance of a porous nickel-iron (Ni-Fe) alloy were investigated. The samples were compressed with ratios from 10% to 80% at an interval of 10%. Based on the standing wave method, sound absorption coefficients of compressed samples with different thicknesses were obtained. It could be found that with the same compression ratio, sound absorption performance was improved with the increase of thickness. Based on the modified Johnson-Allard model with a correction factor, the sound absorption coefficient of the porous Ni-Fe with a thickness of 20 mm for different compression ratios was derived, whose aim was to quantificationally analyze influences of the compression ratio. The results indicated that the sample with a compression ratio of 70% exhibited optimal sound absorption performance, and its average sound absorption coefficient reached 88.97% in a frequency range of 1000-6000 Hz. Meanwhile, the section morphologies of compressed samples were investigated by a scanning electron microscope, which studied the sound absorption performance by analyzing structures of the porous Ni-Fe samples with different compression ratios. The obtained achievements will promote the application of the porous Ni-Fe alloy in the field of acoustics.

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Section: Measurement Of Sound Absorption Coefficients At Normal Incidmentioning

confidence: 99%

Section: Measurement Of Sound Absorption Coefficients At Normal Incidmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influences of Compression Ratios on Sound Absorption Performance of Porous Nickel–Iron Alloy

Bai

Shen

Zhang

et al. 2018

Metals

Self Cite

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“…For the noise reduction in the cabin, polyester fiber is considered as a promising sound absorbing material [2,3], because it has the excellent sound absorbing coefficient and can be installed on the inner wall. However, with the different parameters, such as different density or different thickness, sound absorbing performance of the polyester fiber is varied [4].…”

Section: Introductionmentioning

confidence: 99%

Investigation on Sound Absorbing Performance of the Polyester Fiber for Noise Reduction in Large-scale Equipment

Bai

Yang

Shen

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Polyester fiber was attempted to reduce the noise in large-scale equipment. Sound absorbing performance of the polyester fiber with different parameter was investigated based on the standing wave method. Experimental result showed that the sound absorbing coefficients were ameliorated along with the increases of thickness of the polyester fiber. Meanwhile, for the same thickness, the corresponding sound absorbing coefficient of polyester fiber with density of 0.3g/cm 3 was better that of 0.2 g/cm 3 . Furthermore, it could be observed that sound absorbing coefficients were almost increasing linearly along with increase of frequency when thickness of the polyester fiber was low. It would be found that there existed peak of the sound absorbing coefficients when the thickness was large. Especially when the thickness reached 24mm, the sound absorbing coefficients in the frequency range of 2000Hz ~ 6000Hz exceeded 90%. The excellent sound absorbing performances of the polyester fiber would be propitious to reduce noise in large-scale equipment.

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Acoustic Performance of Metallic Foams

Arjunan

Baroutaji

Praveen

et al. 2019

Reference Module in Materials Science and Materials Engineering

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Metallic foams are among the most promising class of materials due to their unique mechanical properties combining low mass with high stiffness, excellent energy absorption, and vibroacoustic damping. Consequently, noise control using methodically engineered metallic foams has received increased attention from both industrial and scientific community. Accordingly, this paper aims to present the mechanism of sound absorption along with the experimental and theoretical procedure that can be used to classify metallic foams. Additionally, the influence of design parameters on the resulting sound absorption coefficient of closed and opencell metallic foams are explored. While aluminium foams used to dominate the literature when it comes to acoustics, recent studies have reported Nickel-Inconel superalloy and Copper foams as having superior sound absorption coefficients.

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Geometrical and Dimensional Optimization of Sound Absorbing Porous Copper with Cavity

Cited by 29 publications

References 21 publications

Influences of Compression Ratios on Sound Absorption Performance of Porous Nickel–Iron Alloy

Influences of Compression Ratios on Sound Absorption Performance of Porous Nickel–Iron Alloy

Investigation on Sound Absorbing Performance of the Polyester Fiber for Noise Reduction in Large-scale Equipment

Acoustic Performance of Metallic Foams

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