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The reflection, refraction and diffraction of sound waves and a sound wave model. (a) Reflection of sound waves. When sound waves meet a barrier between two different media they can be reflected just like any other wave (diagram of wavefronts on the right).
Boundary Behavior. Reflection, Refraction, and Diffraction. Like any wave, a sound wave doesn't just stop when it reaches the end of the medium or when it encounters an obstacle in its path. Rather, a sound wave will undergo certain behaviors when it encounters the end of the medium or an obstacle. Possible behaviors include reflection off the ...
Refraction is the bending of waves when they enter a medium where their speed is different. Refraction is not so important a phenomenon with sound as it is with light where it is responsible for image formation by lenses, the eye, cameras, etc.
When a sound wave meets a boundary it may be: reflected. refracted. absorbed. Whether a sound wave is reflected, refracted, or absorbed depends on the densities of the materials either side...
Refraction of Sound. Balloons filled with helium, CO 2, or SF 6 act as diverging and converging lenses, respectively. What it shows: A balloon, filled with a gas different from air, will refract sound waves. A gas denser than air turns the balloon into a converging lens and a lighter gas makes it a diverging lens.
Sound waves are longitudinal waves of compression and rarefaction in which the air molecules move back and forth parallel to the direction of wave travel centered on an average position, resulting in no net movement of the molecules. When these waves strike another object, they cause that object to vibrate by exerting a force on them.
Refraction of sound waves. In the first case the observer experiences a reduced audibility and in the second case he observes enhanced audibility. Sound waves have rectilinear propagation only if the speed of sound is constant in space (ie., under no wind conditions).
