Sound absorption model of foam glass-ceramics based on microstructure
•Study of foam glass-ceramics for sound barriers on traffic networks.•Three sub-structure factors were introduced to modify Johnson-Allard model.•Sound absorption model of foam glass-ceramics was established. Foam glass-ceramics have the characteristics of broadband sound absorption, lightweight and...
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Published in | Journal of non-crystalline solids Vol. 604; p. 122136 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
15.03.2023
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Subjects | |
Online Access | Get full text |
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Summary: | •Study of foam glass-ceramics for sound barriers on traffic networks.•Three sub-structure factors were introduced to modify Johnson-Allard model.•Sound absorption model of foam glass-ceramics was established.
Foam glass-ceramics have the characteristics of broadband sound absorption, lightweight and high-strength, which can be utilized in sound barriers on traffic networks. Due to the complexity of microstructure, there is no sound absorption model suitable for foam glass-ceramics at present. In order to realize the prediction of sound absorption performance, a sound absorption model based on Johnson-Allard model was studied in this paper. The results show that the sound absorption coefficient of foam glass-ceramics only can be accurately predicted by Johnson-Allard model in a relatively low frequency band (500∼1250 Hz). Therefore, to broaden the applicability of the model to acoustic frequencies, three sub-structure factors were introduced to modify Johnson-Allard model with the influence of microstructure on the sound absorption performance fully considered. The results show that the modified Johnson-Allard model has high accuracy in predicting the sound absorption coefficient of foam glass-ceramics in the full frequency band of traffic network noise. |
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ISSN: | 0022-3093 1873-4812 |
DOI: | 10.1016/j.jnoncrysol.2023.122136 |