Engineering

3-D printed active metamaterials for sound and vibration control

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 ...

Energy & Green Tech

Battery-free 'smart' toys move closer to commercial reality

Rubber duckies could soon be at the forefront of an electronic revolution. In ACS Sustainable Chemistry & Engineering, scientists report they have used specialized nanogenerators that gather energy from mechanical vibrations ...

Engineering

Listening to engine blades to stop failures, disasters

The roar of a jet or race car engine can nearly take one's breath away. Now imagine trying to hear through all that noise to pinpoint a problem with the engine—and stop a potentially disastrous failure.

Engineering

Mystery solved: The case of the slipping finger

Haptics researchers have long known that applying ultrasonic vibrations to a flat, featureless glass plate makes it feel slippery. But they have also long debated why this occurs.

Engineering

Lattice structure absorbs vibrations

Researchers at ETH Zurich have developed a lattice structure capable of absorbing a wide range of vibrations while also being useful as a load-bearing component—for example, in propellers, rotors and rockets. It can absorb ...

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