A New Metamaterial With Exceptional Properties to Pass Sound

Published By : 02 Jan 2019 | Published By : QYRESEARCH

The scientists at the Advanced Science Research Center (ASRC) have developed a metamaterial that can pass sound numerous ways to edges and corners.

A new study published in Nature Materials states that a new material creates an acoustic structure that controls unusual ways for the propagation of sound. This material improves technologies such as ultrasound devices and sonars.

This research is in collaboration with a professor of engineering, Alexander Khanikaev who received affiliation from ASRC and Andrea Alù. This study brought advancements in the area of mathematics – topology. Topology is a study of objects that do not undergo the deformations.

Using these principles, the researchers revealed topological insulators, which conduct electric currents, but not in large amount. However, it has some unusual conduction properties, which lead to creating an electronic band gap and the material becomes resistant to changes especially in the noise and imperfection.

This interest is trying to outspread concepts from electric currents to another type of signal transport for topological photonics. The researchers are focusing on building material, which will be able to guide and localize sound waves in unusual ways.

Designing these novel acoustic materials involves the arrangement and connection of triangular lattice. Each unit includes the three acoustic resonators. This mode of resonators hybridized for giving rise to a band structure for whole objects. Thus, when a song is played at such frequencies apart from the band gap, it gets propagated from the bulk material.

However, the sound is played at such frequencies bound in the band gap and it can be traveled through the triangle’s edges or at localized corners.

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