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Modular Design of Multilayer System for Impedance Tube Measurement

Institut
Lehrstuhl für Akustik mobiler Systeme
Typ
Bachelorarbeit / Semesterarbeit / Masterarbeit /
Inhalt
experimentell / konstruktiv /  
Beschreibung

The impedance tube method is one of the most convenient approaches to characterize the acoustic properties of porous materials. It only requires small-size specimens and is able to measure various parameters (e.g., sound absorption coefficient, reflection coefficient, transmission loss, etc.). The impedance tube measurement for single layer samples and the samples backed with an airgap is very easy to carry out. However, because it is complicated to control the thickness of each layer in the impedance tube, the measurement of a multilayer system containing several airgap layers became very tricky. It has been proved that multilayer systems have the potential for excellent sound absorption. Hence, it is necessary to use modular design for the development of reconfigurable specimen holders to simplify the measurement for multilayer systems. The position and thickness of each layer of the multilayer system should be changeable, and the material of any layer is able to be replaced by other materials. Thanks to the reconfigurable holders, the multilayer system with excellent acoustic properties can also be modularly designed and validated.

Tasks:

  • Modular design for reconfigurable specimen holders
  • Preparation of digital models in computer-aided design (CAD) program (e.g., Solidworks)
  • Build the specimen holders via a 3D printing service
  • Impedance tube measurement and improvement of the design
  • Application of the reconfigurable specimen holders to develop multilayer systems for excellent acoustic properties
Voraussetzungen
  • Proficiency in a software for computer-aided design (CAD), e.g. Solidworks
  • Knowledge about construction guidelines using 3D printing techniques desired but not required
Möglicher Beginn
sofort
Kontakt
Tao Yang, Ph.D.
Raum: MW 1534
Tel.: 089 289 55131
tao.yangtum.de
Ausschreibung