Adaptive model-based control of boundary impedance in an acoustic impedance tube
Impedance tubes play an essential role in the conduction of nondestructive testing (NDT) of
composite materials to measure their acoustic properties1, 2. The impedance tube is
composed of a hollow elastic cylinder filled with a representative fluid under which the
acoustic properties are estimated. Most impedance testing experiments separate the
measured pressure wave into its forward and backward traveling components, under the
assumption of a single planar propagating mode3. It was shown4–6 that the interaction …
composite materials to measure their acoustic properties1, 2. The impedance tube is
composed of a hollow elastic cylinder filled with a representative fluid under which the
acoustic properties are estimated. Most impedance testing experiments separate the
measured pressure wave into its forward and backward traveling components, under the
assumption of a single planar propagating mode3. It was shown4–6 that the interaction …
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