Metamaterials researchers have created a thin plastic structure with geometric details allowing it to control the redirection and reflection of sound waves with almost perfect efficiency.

Waves close wavesVibrations that transfer energy from place to place without the transference of matter. - including sound and light - can be reflected at the boundary between two different materials.

Ultrasound close ultrasoundSound with a frequency greater than 20,000 Hz (20 kHz). is sound with a frequency greater than 20,000 Hz. Humans cannot hear ultrasound but many other animals can, such as ...

TULSA, Okla. — ACTION Tulsa, the YWCA and the Sherwin Miller Museum of Jewish Art are all partnering with Tulsa Opera for an evening of reflection inspired by the themes explored in the Tulsa Opera's ...