Congratulation to CMRI PGR Dan Moore whose paper ‘Acoustic metasurfaces with Frieze symmetries‘ has been published in the Journal of the Acoustical Society of America. The work also contains further CMRI contributions with CMRI academics Tim Starkey and Greg Chaplain as co-authors of the study.
Frieze patterns are patterns that follow specific arrangement rules and can be seen in architecture and decorations dating back to the Ancient Greek and Roman civilizations. In this work, Dan and colleagues breathe new life into Frieze patterns by designing, modelling and experimentally characterising acoustic metasurfaces based on each of the distinct Frieze groups.
Discussing the work, Dan had the following to say:
There’s a wealth of literature (including by CMRI groups, across multiple wave domains) on the properties of systems containing glide-symmetry. However, there is a lack of a comprehensive experimental review of the dispersive properties of acoustic waveguides that possess Frieze symmetries, of which glide-symmetry belongs. This study aimed to fill this gap and show how deliberate use of symmetry and translation conditions can be applied to an acoustic metasurface, ensuring that it belongs to one of the seven distinct Frieze groups.
Symmetry and translation are key tools in the metamaterial toolbox. This study provides a comprehensive investigation into using symmetry and translation operators to tune the dispersive properties of a 1D acoustic metasurface.
After working on this paper for so long, I’m relieved and humbled for it to be part of a JASA special issue on wave phenomena in periodic, near-periodic, and locally resonant systems. I’ve been citing JASA articles since undergrad, so to publish a study along side others showcasing metamaterials to the wider acoustics community is exciting and terrifying in equal parts.
