- Abbreviation for the ultrasonic method of nondestructive testing.
- A term referring to acoustic vibration frequencies greater than about 20,000
- The damping of ultrasonic waves as they pass through a medium. See attenuation
Simulation (UTSIM) - A user interface integrating a CAD model representing a part under inspection
and an ultrasound beam model.
Spectrum - Usually, the frequency range from 20,000 to 107 hertz.
But may extend much higher in special applications.
Spectroscopy - Analysis of the frequency content of an acoustic wave.
Generally performed mathematically using a fast Fourier transform.
Testing - The transmission of high-frequency sound waves into a material to detect
imperfections or to locate changes in material properties.
Vibrations - Vibrational waves of a frequency above the hearing range
of the normal human ear are referred to as ultrasonic, and the term therefore
includes all those waves of a frequency of more than approximately 20,000
cycles per second. Also known as ultrasonic waves.
Waves - Sound waves too high in frequency for humans to hear.
Sound Material - A material having no discontinuities which cause
discernible ultrasonic indications at the required test sensitivity level.
- Ultrasound - A test using ultrasonic waves to create an image of the inside of an object.
Light - Light lying just beyond the violet end of the visible spectrum and having wavelengths shorter than approximately 4,000 angstroms.
Crack - A subsurface crack in the base metal near a weld.
- In welding, a groove melted into the base metal adjacent to the toe, or
edge, of a weld and left unfilled.
Area - Any area, entry into which is not controlled.
- The fuzziness or lack of definition in a radiographic image resulting from
the source size, object to film distance and the source to object distance.
Atom - The nuclei of some atoms where the binding energy is not strong enough to hold the nucleus together.
Nucleus - When an imbalance of protons and neutrons
causes the nucleus to change.
238 (Depleted Uranium)
- spend uranium, an isotope of uranium used for shielding sources. It is slightly
radioactive, but its activity is slightly radioactive, but its activity is
insignificant and does not add to any radiation leakage from the shielded