Abstract
We present a 3-dimensional fully natural sonic crystal composed of spherical aggregates of fibers (called Aegagropilae) resulting from the decomposition of Posidonia Oceanica. The fiber network is first acoustically characterized, providing insights on this natural fiber entanglement due to turbulent flow. The Aegagropilae are then arranged on a principal cubic lattice. The band diagram and topology of this structure are analyzed, notably via Argand representation of its scattering elements. This fully natural sonic crystal exhibits excellent sound absorbing properties and thus represents a sustainable alternative that could outperform conventional acoustic materials.
Highlights
Complex biological structures usually result from the adaption of living bodies to their environmental constraints
The acoustic behavior of this fully natural sonic crystal is analyzed via the Argand diagram of both the reflection and transmission coefficients, enabling a novel way to explore the structure topology and the absorption efficiency
50 almost spherical samples were cautiously collected in the morning and by hands to avoid any bias caused by human activities. They were selected after preparation based on their diameter and split into two categories: 15 samples were used for the fiber network acoustic characterization and 15 samples were considered to realize the 2-dimensional man modified sonic crystal and the fully natural 3-dimensional sonic crystal
Summary
Complex biological structures usually result from the adaption of living bodies to their environmental constraints. Aegagropilae such as Posidonia balls are the archetype of these organic structures The proposed fully natural organic sonic crystal is constituted of dissipative and soft-porous spheres, the fiber network micro-structure of which is assessed in this article via acoustic characterization, see Fig. 1b. The skeleton is considered motionless, allowing to only account for the slow wave, i.e., the Aegagropilae fiber network is modeled as an equivalent fluid and only waves propagate in the fluid phase In this way, only the effect of viscothermal losses are studied. Aegagropilae fiber network sonic crystals are shown to be fully natural and highly efficient sound absorbing structures and sustainable alternatives that could overcome conventional acoustic materials
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
