Backwall echoes measures have been carried out with two probes and two specimens: the 64 elements linear array at 3 MHz on a rectangular block and the 32 elements linear array on a tube. The reliability of the beam steering laws around L0° and focal laws at different depths have been evaluated by comparison between Kirchhoff and specular models and measurements.
|Ø Crystal (mm)||Mode||Frequency (MHz)||Bandwith (%)||Phase (°)|
|Linear (64 elts)||L0°||3||90||310|
|Linear (32 elts)||L0°||10||55||290|
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