Acoustic evaluation of Struto nonwovens and their relationship with thermal properties

Yang, Tao; Xiong, Xiang; Mishra, Rajesh; Novák, Jan; Militký, Jiřı́

doi:10.1177/0040517516681958

Cited by 44 publications

(37 citation statements)

References 29 publications

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“…The thermal properties and sound absorption of high-loft nonwovens made by staple, hollow and bi-component polyester were reported in refs. [11,12] The results showed that high-loft polyester nonwovens result in a sound absorption that shows a strong correlation with their thermal resistance. In addition, it was concluded that polyester nonwovens show the best sound absorption performance with airflow resistivity of 6000 Pa s/m 2 .…”

Section: Introductionmentioning

confidence: 99%

Study on the sound absorption behavior of multi-component polyester nonwovens: experimental and numerical methods

Yang

Saati

Horoshenkov

et al. 2018

Textile Research Journal

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This study presents an investigation of the acoustical properties of multi-component polyester nonwovens with experimental and numerical methods. Fifteen types of nonwoven samples made with staple, hollow and bi-component polyester fibers were chosen to carry out this study. The AFD300 AcoustiFlow device was employed to measure airflow resistivity. Several models were grouped in theoretical and empirical model categories and used to predict the airflow resistivity. A simple empirical model based on fiber diameter and fabric bulk density was obtained through the power-fitting method. The difference between measured and predicted airflow resistivity was analyzed. The surface impedance and sound absorption coefficient were determined by using a 45 mm Materiacustica impedance tube. Some widely used impedance models were used to predict the acoustical properties. A comparison between measured and predicted values was carried out to determine the most accurate model for multi-component polyester nonwovens. The results show that one of the Tarnow model provides the closest prediction to the measured value, with an error of 12%. The proposed power-fitted empirical model exhibits a very small error of 6.8%. It is shown that the Delany–Bazley and Miki models can accurately predict surface impedance of multi-component polyester nonwovens, but the Komatsu model is less accurate, especially at the low-frequency range. The results indicate that the Miki model is the most accurate method to predict the sound absorption coefficient, with a mean error of 8.39%.

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Section: Introductionmentioning

confidence: 99%

Study on the sound absorption behavior of multi-component polyester nonwovens: experimental and numerical methods

Yang

Saati

Horoshenkov

et al. 2018

Textile Research Journal

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“…Fiber diameter improves the performance of fibrous sound-absorbing materials, increasing flow resistivity as shown in empirical models developed by multiple authors [ 18 , 63 , 64 , 65 ]. Therefore, fique fibers would make a superior raw material for acoustic absorption applications.…”

Section: Resultsmentioning

confidence: 99%

“…Average coir diameter showed to be slightly larger than fique, a two-sample t-test for equal mean was made, the p-value was 0.0064; therefore, the null hypothesis was rejected and, consequently, there is a significative difference between the diameter of both fibers. Fiber diameter improves the performance of fibrous sound-absorbing materials, increasing flow resistivity as shown in empirical models developed by multiple authors [18,[63][64][65]. Therefore, fique fibers would make a superior raw material for acoustic absorption applications.…”

Section: Density and Diameter Measurementsmentioning

confidence: 96%

Evaluation of Colombian Crops Fibrous Byproducts for Potential Applications in Sustainable Building Acoustics

et al. 2020

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Local production of construction materials is a valuable tool for improving the building sector sustainability. In this sense, the use of lignocellulosic fibers from local species becomes an interesting alternative to the development of such materials. As it is thought that the properties of fiber-based materials are dependent on the fibers properties, the knowledge of such properties is fundamental to promote materials development. This study compares the physical, morphological, acoustic, and mechanical characteristics of coir (Cocos nucifera) and fique (Furcraea Agavaceae) fibers and panels. The chemical composition appears to be associated with the general behavior of the fibers and panels, regarding higher tensile strength, thermal degradation behavior, and water absorption. In most tests, fique had the upper hand, showing superior performance; however, on thermal degradation and water absorption, both materials had similar behavior. The sound absorption measurement showed that the fiber diameter affects the sound absorption at high frequencies, where fique panels showed better performance than coir panels.

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“…Thus, the smaller fiber diameters in samples A, B and C could be one reason accounting for their better sound absorption performance. For high GSM fabrics (samples A, B and C) there are more fibers involved in the viscous losses and more acoustic energy is dissipated in the form of heat energy [27]. …”

Section: Sound Absorption Coefficientmentioning

confidence: 99%

Study on Sound Absorption Performance and Transmission Behavior of Perpendicular-laid Nonwovens

Yang¹

2017

JFBI

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This work deals with the study of acoustic performance of perpendicular-laid nonwovens and their relation to fabric air permeability and thermal properties. Seven perpendicular-laid nonwoven fabrics were selected to examine sound absorption like average values of sound absorption coefficients (α) and noise reduction coefficient (NRC) as well as air permeability and thermal insulation properties. The Brüel and Kjaer impedance tube instrument, Alambeta and FX3300 Air Permeability Tester were used for evaluation of acoustic, thermal and air permeability properties, respectively. It was observed that sound absorption had insignificant correlation with thermal conductivity while it was strongly correlated with thermal resistance. And the correlation coefficient of NRC and thermal resistance was 0.9835, indicating that NRC was directly proportional to thermal resistance of perpendicular-laid nonwovens. It also was observed that α was inversely proportional to air permeability, with correlation coefficient 0.95. It was concluded that a higher thermal resistance and lower air permeability suggested a better sound absorption performance for a perpendicular-laid nonwoven fabric.

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Acoustic evaluation of Struto nonwovens and their relationship with thermal properties

Cited by 44 publications

References 29 publications

Study on the sound absorption behavior of multi-component polyester nonwovens: experimental and numerical methods

Study on the sound absorption behavior of multi-component polyester nonwovens: experimental and numerical methods

Evaluation of Colombian Crops Fibrous Byproducts for Potential Applications in Sustainable Building Acoustics

Study on Sound Absorption Performance and Transmission Behavior of Perpendicular-laid Nonwovens

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