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Define the Types of Transmission in Ultrasonic System?
Types of Transmission
Three Types of Transmission through the testing element is possible, namely:
- Direct transmission
- Semi direct transmission
- Indirect transmission
Direct transmission is used to examine structures wherever opposing surfaces are accessible; for example concrete piles. The indirect transmission is used when only one surface is accessible. Figure shows the three types of transmission through the element.The direct transmission is most preferred as it provides maximum sensitivity with a well-defined path length.
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