ULTRASONIC INSULATION USING A HELMHOLTZ-LIKE PHONONIC CRYSTAL WITH A SLIGHT FILLING FACTOR
| Affiliation auteurs | !!!! Error affiliation !!!! |
| Titre | ULTRASONIC INSULATION USING A HELMHOLTZ-LIKE PHONONIC CRYSTAL WITH A SLIGHT FILLING FACTOR |
| Type de publication | Conference Paper |
| Year of Publication | 2019 |
| Auteurs | A. Madani E, Bensallam S., Elayouch A., Khelif A., Achaoui Y., Bouaaddi A., Jakjoud H. |
| Conference Name | 4TH INTERNATIONAL CONFERENCE ON SMART CITY APPLICATIONS (SCA' 19) |
| Publisher | Mediterranean Assoc Sci & Technologies; Hassania Sch Publ Works |
| Conference Location | 1515 BROADWAY, NEW YORK, NY 10036-9998 USA |
| ISBN Number | 978-1-4503-6289-4 |
| Mots-clés | Acoustic Metamaterials, Helmholtz resonators, Phononic crystals, Sound comfort |
| Résumé | Metamaterials are artificial materials designed to control and manipulate waves. They present the advantage to prohibit acoustic propagation in some frequency ranges called Band Gaps. In this paper, we present a series of Helmholtz-like resonators shaped for ultrasonic insulation purposes. This host plate is made of silicon in which the unit cell represents a phononic membrane formed by a sub-wavelength aperture and two Helmholtz resonators facing each other and immersed in water. The finite element simulations are performed between frequencies 1.7 MHz and 2.95 MHz. It is shown that such configuration exhibits a large band gap exceeding 1000 kHz and an attenuation up to -35 dB. |
| DOI | 10.1145/3368756.3369074 |