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Current issue

ELEKTRO 3/2021 was released on March 10th 2021. Its digital version will be available on March 26th 2021.

Topic: Electrical engineering in industry; Surge protection

Innovation, Technology, Projects
History of STEGO products
Industry 4.0 – past and present
Panasonic: Industrial automation products for your testing
ABB announced a significant increase in the number of charging stations in the Czech Republic

SVĚTLO (Light) 1/2021 was released 2.12.2021. Its digital version will be available immediately.

Interiors lighting
Interior of the year 2020 – offices in time of home office
PROLICHT CZECH fulfils images of architect about illumination of Obecní dvůr residence at Prague Old Town

Luminaires and light apparatuses
Covid 19 – are there actually any news at lighting producer?
Lighting systems of STEINEL company

3-D printed active metamaterials for sound and vibration control

13. 4. 2018 | University of Southern California | viterbischool.usc.edu

A team led by USC Viterbi researchers developed 3-D printed acoustic metamaterials that can be switched on and off remotely using a magnetic field.

Researchers have been pushing the capabilities of materials by carefully designing precise structures that exhibit abnormal properties that can control acoustic or optical waves. However, these metamaterials are constructed in fixed geometries, meaning their unique abilities are always fixed. Now, new 3-D printed metamaterial developed by a team led by USC Viterbi researchers can be remotely switched between active control and passive states.

3-D printed active metamaterials

Metamaterials can be used to manipulate wave phenomena such as radar, sound and light and have been used to develop technology such as cloaking devices and improved communication systems. The team’s metamaterials are able to control environmental sounds and structural vibrations, which have similar waveforms. By 3-D printing a deformable material containing iron particles in a lattice structure, their metamaterials can be compressed using a magnetic field.

Read more at University of Southern California

Image Credit: Qiming Wang

-jk-