Acoustic waves in gases, liquids, and solids usually travel at an almost constant speed of sound. Rotons are an exception: their speed of sound changes significantly with the wavelength, it is also ...

The age of smart, self-optimizing materials has begun. A programmable metamaterial has been developed that shatters the limits of old material science. US researchers at the University of Connecticut ...

Researchers at the Massachusetts Institute of Technology stumbled onto what one called a “very radical” discovery — the new material they had created, akin to silk, could function much in the way a ...

Scientists experimenting with a cutting-edge ultrasound technique have come up with a groundbreaking and incredibly precise way to measure the elasticity of materials at a microscopic scale. Based on ...

A research team at City University of Hong Kong (CityU) has discovered a new type of sound wave: the airborne sound wave vibrates transversely and carries both rotation and orbital angular momentum ...

For the first time, researchers were able to transmit, or "tunnel," sound waves across extremely small distances between two crystals in a vacuum. When you purchase through links on our site, we may ...

Heat is not supposed to behave like this. In everyday life, warmth seeps and diffuses, spreading from hot to cold in a slow, smearing process that never looks anything like a crisp sound wave. Yet ...

Acoustic waves in gases, liquids, and solids usually travel at an almost constant speed of sound. So-called rotons are an exception: their speed of sound changes significantly with the wavelength, and ...