Experimental analysis of the acoustic field of an ultrasonic pulse induced by a fluidic switch.

@article{Bhling2021ExperimentalAO,
  title={Experimental analysis of the acoustic field of an ultrasonic pulse induced by a fluidic switch.},
  author={Benjamin B{\"u}hling and Christoph Strangfeld and Stefan Maack and Thorge Schweitzer},
  journal={The Journal of the Acoustical Society of America},
  year={2021},
  volume={149 4},
  pages={
          2150
        }
}
Ultrasonic inspection is a common tool for non-destructive testing in civil engineering (NDT-CE). Currently, transducers are coupled directly to the specimen surface, which makes the inspection time-consuming. Air-coupled ultrasound (ACU) transducers are more time-efficient but need a high pressure amplitude as the impedance mismatch between the air and the concrete is high and large penetration depth is needed for the inspection. Current approaches aim at eliminating the impedance mismatch… 

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