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Article

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

1
Faculty of Manufacturing Technologies, Technical University in Kosice, 080 01 Presov, Slovakia
2
Faculty of Technology, Tomas Bata University in Zlin, Nam. T.G. Masaryka 275, 760 01 Zlin, Czech Republic
3
Faculty of Mechanical Engineering, VŠB-Technical University of Ostrava, 17. listopadu 15/2172, 708 33 Ostrava-Poruba, Czech Republic
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Mechanical Engineering Faculty, University of Slavonski Brod, Trg Ivane Brlic-Mazuranic 2, HR-35000 Slavonski Brod, Croatia
*
Authors to whom correspondence should be addressed.
Academic Editor: Houwen Matthew Pan
Polymers 2022, 14(3), 413; https://doi.org/10.3390/polym14030413
Received: 21 December 2021 / Revised: 15 January 2022 / Accepted: 18 January 2022 / Published: 20 January 2022
(This article belongs to the Special Issue Advanced Materials in 3D/4D Printing Technology)
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. View Full-Text
Keywords: polylactic acid; sound reflection; excitation frequency; porosity; 3D printing technique; thickness; air gap polylactic acid; sound reflection; excitation frequency; porosity; 3D printing technique; thickness; air gap
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MDPI and ACS Style

Monkova, K.; Vasina, M.; Monka, P.P.; Vanca, J.; Kozak, D. Effect of 3D-Printed PLA Structure on Sound Reflection Properties. Polymers 2022, 14, 413. https://doi.org/10.3390/polym14030413

AMA Style

Monkova K, Vasina M, Monka PP, Vanca J, Kozak D. Effect of 3D-Printed PLA Structure on Sound Reflection Properties. Polymers. 2022; 14(3):413. https://doi.org/10.3390/polym14030413

Chicago/Turabian Style

Monkova, Katarina, Martin Vasina, Peter Pavol Monka, Jan Vanca, and Dražan Kozak. 2022. "Effect of 3D-Printed PLA Structure on Sound Reflection Properties" Polymers 14, no. 3: 413. https://doi.org/10.3390/polym14030413

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