These obstacles can be in the form of walls of a room, a table, or any other object we see around us. Two identical sound waves will interfere constructively if their paths differ in length by a whole number of wavelengths — destructively if its a half number. Diffusion, in architectural acoustics, is the spreading of sound energy evenly in a given environment.A perfectly diffusive sound space is one in which the reverberation time is the same at any listening position. The diffracting object or aperture effectively becomes a secondary source of the propagating wave. When waves meet a gap in a barrier, they carry on through the gap. Another important case in which sound waves bend or spread out is called refraction. This phenomenon involves the bending of a sound wave owing to changes in the wave’s speed. However, the waves spread out to some extent into the area beyond the gap. When light passes through a small opening, comparable in size to the wavelength λ of the light, the wavefront on the other side of the opening resembles the wave. chaos; eworld; facts; get bent; physics; The Physics Hypertextbook. Think about the places that most animals live. When light travels in air, it encounters various phenomena like interference, refraction, reflection and diffraction. It is defined as the bending of waves around the corners of an obstacle or through an aperture into the region of geometrical shadow of the obstacle/aperture. Diffraction of sound waves is one big reason that animals can communicate over long distances. Diffraction occurs if a wave encounters an object and if the wavelength is of the same size (or greater than) the object size. It is due to this phenomenon that we can hear the sound of a boy standing on the other side of a wall but we cannot see him. Diffraction. When the light comes in contact with an obstacle, diffraction of light takes place. Diffraction refers to various phenomena that occur when a wave encounters an obstacle or a slit. Most interior spaces are non-diffusive; the reverberation time is … Sound - Sound - Refraction: Diffraction involves the bending or spreading out of a sound wave in a single medium, in which the speed of sound is constant. Overview of Diffraction Of Sound Waves. Diffraction Of Sound Waves Definition. Diffraction of sound waves is the phenomenon of bending of this wave around obstacles. An example of diffraction phenomena is given by the spreading of waves around an obstacle.