Refraction (sound) Refraction (sound) Refraction, in acoustics, comparable to the refraction of electromagnetic radiation, is the bending of sound propagation trajectories (rays) in inhomogeneous elastic media (gases, liquids, and solids) in which the wave velocity is a function of spatial coordinates. Bending of acoustic rays in layered inhomogeneous media occurs towards a layer with a smaller sound velocity. This effect is responsible for guided propagation of sound waves over long distances in the ocean and in the atmosphere. In the atmosphere, vertical gradients of wind speed and temperature lead to refraction. The wind speed is usually increasing with height, which leads to
Primetime Emmy Award for Outstanding Art Direction for a Miniseries or Movie Primetime Emmy Award for Outstanding Art Direction for a Miniseries or Movie The Primetime Emmy Award for Outstanding Art Direction for a Miniseries or Movie is a retired award that was handed out annually at the Creative Arts Emmy Awards. In 2014, the category was restructured into Outstanding Production Design for a Narrative Contemporary or Fantasy Program (One Hour or More) and Outstanding Production Design for a Narrative Period Program (One Hour or More). Outstanding Achievement in Art Direction and Scenic Design Outstanding Art Direction for a Dramatic Program or Series Outstanding Art Direction for a Dramatic Special Outstanding Art