Acoustic seminar | 01 March 2024

Controlling audible sound requires inherently broadband and subwavelength acoustic solutions, which are to date, crucially missing. In the attempt to solve this vexing issue we introduce the concept of plasmacoustic metalayers. We show that the dynamics of small layers of air plasma can be controlled to interact with sound in a broadband way and over deep-subwavelength distances, demonstrating perfect sound absorption effect, from several Hz to the kHz range.