Refraction (sound) a downward bending of the sound rays towards the ground. The same holds if the temperature is decreasing with height. If the temperature is increasing with height (inversion) and the wind speed is low, sound rays are bend upwards. 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
A Boy, a Girl and a Bike gave the film two out of five stars, calling it, "A minor, good-natured British comedy romance." A Boy, a Girl and a Bike A Boy, a Girl and a Bike is a 1949 British romantic comedy film directed by Ralph Smart and starring John McCallum, Honor Blackman and Patrick Holt. The film's art direction was by George Provis. The film concerns the romantic escapades and adventures of a Yorkshire cycling club. Young couple Sue (Honor Blackman) and Sam (Patrick Holt) are members of a Yorkshire cycling club, the ‘Wakeford Wheelers’. Romantic complications ensue when wealthy David (John McCallum) becomes smitten