Olympus EPOCH 650 User Manual page 340

DMTA-10055-01EN, Rev. A, February 2015
Term
Sensitivity
Signal-to-noise ratio
Single element probe
Skip-distance
Sound beam
Sound path distance
Straight beam probe
(Normal beam probe)
Surface wave
Through
transmission
Time-corrected gain
(TCG)
Transducer
328 Appendix C
Table 32 Glossary (continued)
The ability of the test system (instrument and transducer)
to detect a given size reflector at a given distance.
The amplitude ratio between the echo from a given
indication and background indications such as grain
scattering or instrument noise.
A transducer containing only one piezoelectric element,
which is used to both transmit and receive sound.
In angle beam testing, the surface distance which
represents one V-path of sound in the material.
The characteristic shape of the ultrasonic wave in a test
piece.
The distance between the transducer and a reflector. In
angle beam and immersion testing, this is commonly
measured from the point at which sound enters the test
piece. This is sometimes referred to as angular distance in
angle beam testing.
A transducer that transmits sound into the test piece
perpendicular to the entry surface.
A mode of wave propagation characterized by an elliptical
movement of the particles on the surface of the specimen
as the wave front moves forward, penetrating the
specimen to a depth of one wavelength.
A test method in which the pulses from a transmitting
transducer are received by a second transducer on the
opposite side of the test piece.
A software function that adjusts instrument gain so
that the echo amplitude of a given size reflector is
displayed at a constant display height regardless of
the distance to that given size reflector
A device that transforms one form of energy into another.
Definition
.