Angle Beams I

Angle Beam Transducers and wedges are typically used to introduce a refracted shear wave into the test material. An angled sound path allows the sound beam to come in from the side, thereby improving detectability of flaws in and around welded areas.

A test specimen will have a thickness T. The angle that the sound travels at through the material is angle theta-R (the angle of refraction). The surface distance is sin(theta-R)x. The depth of the first leg is cos(theta-R)x.