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Improving Sound Absorption Properties Using 3D-Printed ASA Concentric Tubular Structures with Intermediate Lattice

Martin Vasina1,2, Katarina Monkova3, Adrian Vodilka3

  • 1Faculty of Technology, Tomas Bata University in Zlin, Vavreckova 5669, 760 01 Zlin, Czech Republic.

Polymers
|May 27, 2026
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This study explores 3D-printed tubular structures for noise reduction. Optimized designs with more tubes and specific dimensions significantly enhance sound absorption, offering a promising solution for environmental noise mitigation.

Area of Science:

  • Acoustics and Materials Science
  • Additive Manufacturing
  • Environmental Engineering

Background:

  • Noise pollution poses significant health risks, necessitating effective mitigation strategies.
  • Passive sound absorption materials are crucial for noise reduction.
  • 3D printing enables the creation of complex structures for advanced acoustic applications.

Purpose of the Study:

  • To investigate the sound absorption performance of novel 3D-printed concentric tubular structures.
  • To evaluate the impact of design parameters on acoustic properties.
  • To explore the potential of acrylonitrile styrene acrylate (ASA) for noise reduction.

Main Methods:

  • Experimental evaluation of sound absorption using a two-microphone acoustic impedance tube (200-1600 Hz).
Keywords:
3D printingback air cavityconcentric tubesexcitation frequencylattice structuresound absorptionstrut diameter

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  • Fabrication of concentric tubular structures with intermediate lattice inserts using 3D printing.
  • Systematic variation of design parameters: number of tubes, sample height, strut diameter, and back air cavity thickness.

    • Main Results:

    • Sound absorption performance is highly dependent on design parameters.
    • Average sound absorption coefficient increased with the number of concentric tubes, reaching 0.264 for five tubes.
    • A peak sound absorption of 0.623 was achieved with specific dimensions (2 tubes, 3mm strut, 30mm height, 10mm cavity) at ~1548 Hz.
    • Increased strut diameter and sample height generally improved absorption.
    • Back air cavity significantly shifted absorption peaks to lower frequencies.

    Conclusions:

    • 3D-printed concentric tubular structures show significant potential for effective sound absorption.
    • Design optimization is key to maximizing noise reduction performance.
    • The inclusion of a back air cavity is effective for enhancing low-frequency sound absorption.