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Characterization of Membrane-Type Acoustic Metamaterial Unit Cells Fabricated by Additive Manufacturing Methods

Dinçer, Ugur and Misol, Malte and Monner, Hans Peter (2023) Characterization of Membrane-Type Acoustic Metamaterial Unit Cells Fabricated by Additive Manufacturing Methods. In: 10th Convention of the European Acoustics Association, EAA 2023. 10th Convention of the European Acoustics Association, 2023-09-11 - 2023-09-15, Turin, Italy. ISBN 978-888894267-4. ISSN 2221-3767.

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Abstract

Membrane-type acoustic metamaterials fall into the category of metamaterials with locally resonant behavior. Adjusting the unit cell properties brings the opportunity to tune resonance/anti-resonance frequencies. Moreover, noise attenuation might be achieved in the desired frequency range using artificially engineered lightweight structures. Conventional methods for the realization of membrane-type acoustic metamaterials cause such uncertainties on the fundamental parameters: positioning and shape limitation of the masses and adjustment of membrane pre-stress. Subsequently, those methods are time-consuming considering large-scale structure fabrication. Additive manufacturing approaches minimize the side effects caused by conventional methods with a repeatable and robust process. In this research, various membrane-type acoustic metamaterial unit cells are manufactured using multimaterial printing via the fused deposition modeling (FDM) method. Flexible (TPU) filament is used for the membrane, while relatively rigid filament (PETG) is chosen for the frame and the masses. Initially, the unloaded unit cells are examined in order to evaluate 3-D printed membrane prestress and repeatability of the fabrication approach. Afterwards, the effects of membrane and mass properties on the sound transmission loss (STL) behaviors of the unit cells are investigated using an impedance tube in order to implement in multi-celled membrane-type acoustic metamaterials.

Item URL in elib:https://elib.dlr.de/198566/
Document Type:Conference or Workshop Item (Speech)
Title:Characterization of Membrane-Type Acoustic Metamaterial Unit Cells Fabricated by Additive Manufacturing Methods
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Dinçer, UgurUNSPECIFIEDhttps://orcid.org/0000-0002-2484-4545145715658
Misol, MalteUNSPECIFIEDhttps://orcid.org/0000-0001-8056-1569UNSPECIFIED
Monner, Hans PeterUNSPECIFIEDhttps://orcid.org/0000-0002-5897-2422UNSPECIFIED
Date:September 2023
Journal or Publication Title:10th Convention of the European Acoustics Association, EAA 2023
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
ISSN:2221-3767
ISBN:978-888894267-4
Status:Published
Keywords:Membrane-type Acoustic Metamaterial, Fused Deposition Modeling, Sound Transmission Loss
Event Title:10th Convention of the European Acoustics Association
Event Location:Turin, Italy
Event Type:international Conference
Event Start Date:11 September 2023
Event End Date:15 September 2023
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Components and Systems
DLR - Research area:Aeronautics
DLR - Program:L CS - Components and Systems
DLR - Research theme (Project):L - MRO and Cabin
Location: Braunschweig
Institutes and Institutions:Institut für Systemleichtbau > Adaptronics
Deposited By: Dinçer, Ugur
Deposited On:01 Nov 2023 08:46
Last Modified:03 Jun 2024 08:10

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