Acoustic microscopy  From Wikipedia, the free encyclopedia Jump
to: navigation, search  Acoustic microscopy is microscopy that
employs very high or ultra high frequency ultrasound. Acoustic
microscopes operate nondestructively and penetrate most solid
materials to make visible images of internal features, including
defects such as cracks, delaminations and voids.[disambiguation
needed]  Types of acoustic microscopes[edit]  In the half-
century since the first experiments directly leading to the
development of acoustic microscopes, at least three basic types
of acoustic microscope have been developed. These are the
scanning acoustic microscope (SAM), scanning laser acoustic
microscope (SLAM), and C-mode scanning acoustic microscope
(C-SAM).[1] For details of development see the History section
below. Since the vast majority of acoustic microscopes in use
today are C-SAM type instruments, this discussion will be
limited to these instruments.  Behavior of ultrasound in
materials[edit]  Ultrasound is broadly defin