Acoustic Metasurfaces: A transformative Approach for Low-Frequency Absorption and Mitigation
Abstract
The main objective of this research is to realize a deep-subwavelength acoustic metasurface capable of absorbing low-frequency acoustic and elastic waves in the frequency range of 100 to 300Hz. Based on the long experience and achievements of our group in the field of acoustic/elastic metamaterials and metasurfaces, and the recent developments we made in this field of acoustic and vibration absorption and mitigation, we propose here a new paradigm based on the coiling-up space approach to deal with broadband low-frequency acoustic and elastic absorption and mitigation. The new approaches and designs can fully overcome the lack of classical acoustic and vibration absorbers suffering from the huge thickness in low frequencies and narrow bandwidth, which hinder from the real applications especially in the field of aeronautics and aerospace. In this proposed research, to fully reach our objectives, we will deal with theoretical, numerical and experimental developments and analyses to realize first, low frequency absorber/isolator metasurface-based for acoustic and elastic (vibrations) waves, taking into account the potential coupling effect between the acoustic and elastic waves with their different propagation modes. We will deal with the viscosity effect as well as broadband and omnidirectional properties of conceived metastructures. Second, we will cope with the multifunctionality aspect of developed metasurfaces and metamaterials. The idea is to propose multifunctional composite artificial material meta-based in the real environment (aeronautics) and to study the sensing, filtering and energy harvesting functionalities of those metasurfaces and metamaterials and their behaviors in the real situation.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 24, 2019
- Source ID
- FA95501817021
Entities
People
- Badreddine M Assouar
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of Lorraine