Reflection of Acoustic Waves From a Porous Material at Oblique Incidence

Gimaltdinov, I. K.; Sitdikova, L. F.; Дмитриев, В. Л.; Levina, T.M.; Khabeev, N. S.; Song, Wanqing

doi:10.1007/s10891-017-1655-1

Cited by 13 publications

(1 citation statement)

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“…In recent years, with the development of manufacturing technology, porous materials have presented a challenge to many researchers to study their sound absorption or reflection properties. The process of reflecting acoustic waves in porous materials in the case of oblique impact of acoustic waves was studied by Gimaltdinov et al [ 17 ] The results showed, that with increasing angle of impact, transmission decreases. According to [ 18 ], lightweight materials, such as foam or fabric, are often too porous to reflect sound passing through, and their energy is converted into heat with a reduction in magnitude.…”

Section: Introductionmentioning

confidence: 99%

Effect of 3D-Printed PLA Structure on Sound Reflection Properties

et al. 2022

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3D printing technique is currently one of the promising emerging technologies. It is used in many areas of human activity, including acoustic applications. This paper focuses on studying the sound reflection behavior of four different types of 3D-printed open-porous polylactic acid (PLA) material structures, namely cartesian, octagonal, rhomboid and starlit structures. Sound reflection properties were evaluated by means of the normal incidence sound reflection coefficient based on the transfer function method using an acoustic impedance tube. In this study, various factors affecting the sound reflection performance of the investigated PLA samples were evaluated. It can be concluded that the sound reflection behavior of the tested PLA specimens was strongly affected by different factors. It was influenced, not only by the type of 3D-printed open-porous material structure, but also by the excitation frequency, the total volume porosity, the specimen thickness, and the air gap size behind the tested specimen inside the acoustic impedance tube.

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Section: Introductionmentioning

confidence: 99%