Ultrasonic Guided Waves-Based Monitoring of Rail Head: Laboratory and Field Tests

<table>Average detection rate as a function of the dimension of the damage index vector as a result of probing transverse defects with central sensor pairs and high-frequency bandwidth in Test 1.</table>

Advances in Civil Engineering

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Figure 9

Figure 9: Ultrasonic Guided Waves-Based Monitoring of Rail Head: Laboratory and Field Tests 