Skip to main content
padlock icon - secure page this page is secure

Characterization of the acoustic properties of complex shape metamaterials

Buy Article:

$15.00 + tax (Refund Policy)

The paper presents the design and the acoustic properties evaluation of complex shape metamaterials. Complex metamaterials are a better alternative to conventional acoustic materials to absorb acoustic energy at low frequencies when the available volume is limited. Moreover these metamaterials are well adapted for harsh environments (high temperature, high pressure). In addition, traditional methods of performance evaluation are generally developed and used for simple shape geometries with known acoustic properties. In the present study, the metamaterials were placed in the restricted available volume. Their design is based on periodic neck-cavity configurations. In order to broaden the sound absorption coefficient frequency range, different cells were connected in parallel and in series. Owing to the fact that the cavities are small and of complex shape, a numerical Thermo-Visco-Acoustic (TVA) model was used to simulate the acoustic behavior of each periodic cell. Finally, the TVA was combined with transfer matrix methods to deduce the acoustic absorption coefficient of the metamaterials. The numerically predicted results using the present approach are in good agreement with measurements on prototypes. It is shown that these relatively thin metamaterials allow for low frequency sound absorption with wide absorption coefficient peaks.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Document Type: Research Article

Affiliations: 1: National Research Council Canada 2: École de Technologie Supérieure 3: Université de Sherbrooke 4: University of Campinas

Publication date: October 12, 2020

More about this publication?
  • The INTER-NOISE and NOISE-CON congress and conference proceedings is a collection of the presented papers. The papers are not peer reviewed and usually represent a synopsis of the material presented at the congress or conference.

  • Membership Information
  • INCE Subject Classification
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more