Acoustic absorbers by additive manufacturing

Setaki, Fotini; Tenpierik, Martin; Turrin, Michela; Timmeren, Arjan van

doi:10.1016/j.buildenv.2013.10.010

Cited by 45 publications

(32 citation statements)

References 4 publications

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“…For example, AM has been used to create integrated air ducts [41][101][311] [209] and wiring conduits [209] for industrial robots; 3D flexures for integrated actuators and universal grippers [134], complex internal pathways for acoustic damping devices [285]; optimized fluid channels (Fig. 12), and internal micro vanes for ocular surgical devices [69].…”

Section: Internal Freeform Geometry For Functionality and Performancementioning

confidence: 99%

Design for Additive Manufacturing: Trends, opportunities, considerations, and constraints

et al. 2016

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The past few decades have seen substantial growth in Additive Manufacturing (AM) technologies. However, this growth has mainly been process-driven. The evolution of engineering design to take advantage of the possibilities afforded by AM and to manage the constraints associated with the technology has lagged behind. This paper presents the major opportunities, constraints, and economic considerations for Design for Additive Manufacturing. It explores issues related to design and redesign for direct and indirect AM production. It also highlights key industrial applications, outlines future challenges, and identifies promising directions for research and the exploitation of AM's full potential in industry.Design, Manufacturing, Additive Manufacturing

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Section: Internal Freeform Geometry For Functionality and Performancementioning

confidence: 99%

Design for Additive Manufacturing: Trends, opportunities, considerations, and constraints

et al. 2016

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“…The 3D printing techniques are ideal solutions to complex structures [27][28][29], but their application to acoustic structures is still at an early stage with very limited literature. Selective Laser Sintering (SLS), which is a powder-bed-fusion 3D printing process [30][31][32][33], has the potential [34][35][36] to rapidly fabricate the MPP structures by using various polymer materials in a single step without tooling or molding processes [37,38]. It fabricates 3D objects by using a CO 2 laser beam to sinter thermoplastic polymer powders by using each layer.…”

Section: Introductionmentioning

confidence: 99%

3D Printing of Polymeric Multi-Layer Micro-Perforated Panels for Tunable Wideband Sound Absorption

et al. 2020

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The increasing concern about noise pollution has accelerated the development of acoustic absorption and damping devices. However, conventional subtractive manufacturing can only fabricate absorption devices with simple geometric shapes that are unable to achieve high absorption coefficients in wide frequency ranges. In this paper, novel multi-layer micro-perforated panels (MPPs) with tunable wideband absorption are designed and fabricated by 3D printing or additive manufacturing. Selective laser sintering (SLS), which is an advanced powder-based 3D printing technique, is newly introduced for MPP manufacturing with polyamide 12 as the feedstock. The acoustic performances of the MPPs are investigated by theoretical, numerical, and experimental methods. The results reveal that the absorption frequency bandwidths of the structures are wider than those of conventional single-layer MPPs, while the absorption coefficients remain comparable or even higher. The frequency ranges can be tuned by varying the air gap distances and the inter-layer distances. Furthermore, an optimization method is introduced for structural designs of MPPs with the most effective sound absorption performances in the target frequency ranges. This study reveals the potential of 3D printing to fabricate acoustic devices with effective tunable sound absorption behaviors and provides an optimization method for future structural design of the wideband sound absorption devices.

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“…However, for enhanced acoustic absorption, design-based strategies, as opposed to materials, are required [19]. Accordingly, this research explores the development of acoustic absorbers that utilises the principles of Acoustic Interference (AI) [20,21] where the sound absorption can be tailored based on the sound source frequency.…”

Section: Introductionmentioning

confidence: 99%

“…The exception to this is the pioneering works by Godbold, Soar, and Buswell [36], where interference cavities were benchmarked against conventional resonators showing that interference can take arbitrary and conformal paths. This was followed by Setaki et al [21] who presented a potential application of interference on building acoustics. Further to this, the sound absorption of free-form geometries and two-dimensional planar cavities were studied by Berardi [37] and Cai et al [38] respectively.…”

Section: Introductionmentioning

confidence: 99%

Acoustic absorption of passive destructive interference cavities

Arjunan

2019

Materials Today Communications

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Acoustic products are primarily designed for broadband acoustic absorption.However, frequency-dependent acoustic absorption featuring passive designbased solutions are necessary to combat the growing noise pollution.Accordingly, this research investigates the targeted creation of sound absorption as a function of geometry utilising the principle of Acoustic Interference (AI). A methodology to design freeform geometries that can create targeted acoustic absorption is presented. The effectiveness of this methodology is then experimentally validated while quantifying the influence of length, diameter and geometry orientation. The results establish that AI has the potential to create 'near perfect' sound absorption that can be customised depending on the source frequency. The design freedom revealed by this study allows the exploitation of freeform geometries as passive highefficiency sound absorbing devices.

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Acoustic absorbers by additive manufacturing

Cited by 45 publications

References 4 publications

Design for Additive Manufacturing: Trends, opportunities, considerations, and constraints

Design for Additive Manufacturing: Trends, opportunities, considerations, and constraints

3D Printing of Polymeric Multi-Layer Micro-Perforated Panels for Tunable Wideband Sound Absorption

Acoustic absorption of passive destructive interference cavities

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