4.1 Acoustic Microscopy Theory, Techniques, and Specimen Preparation The Physical Interaction between Ultrasound and Solid Media • A Historical Perspective of the Study of Bone with Acoustic Microscopy • Specimen Preparation • The Acoustic Microscope 4.2 Acoustic Studies of Cortical Bone Material Properties Low Frequency • High Frequency 4.3 Acoustic Microscopy and Biomaterials Analysis Acousti...

The technological developments in the design of an adaptive optical scanning acoustic microscope are described. Its two key elements include a multi-channel acoustic wavefront detector to detect the acoustic wavefront aberration and a highly adaptive acoustic source to correct for the effects of aberration. We present experimental images acquired with the instrument that indicate the degree of ...

A modified geometric ray approach is used to predict he V(x,z) or the acoustic material signature of a circular point-focus scanning acoustic microscope for an isotropic surface containing a surface-breaking crack. The microscope r sponse isassumed to consist of a specularly reflected geometric contribution, and the leaky contribution due in part to surface waves cattered from the crack. The lo...

The scanning acoustic microscope gives strong contrast from small caries lesions in sections of human enamel. The uniqueness of the acoustic microscope lies in its ability to image elastic properties. In addition to revealing the extent and the shape of lesions, the microscope may also be used to measure the elastic properties point by point across an area of interest. Since enamel is anisotrop...

High frequency acoustic imaging represents a powerful technique for the nondestructive evaluation of optically opaque materials. In this report the Scanning Laser Acoustic Microscope (SLAM) is used to detect and characterize flaws in ceramics. SLAM micrographs showing typical examples of cracks, laminar flaws, porosity and solid inclusions. are presented. The various flaw types are easily diffe...