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Problem 1: Modeling Acoustic Reflection in a Water Column Probe

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When using a water column as an ultrasound probe for Nondestructive Evaluation (NDE), sound is transmitted from the transducer into the water column. As it  travels through the water to the end of the tube it also interacts with the column sides. Generally, the sound is reflected back into the tube which creates excessive ambient noise. Can the Wave Formula be used to predict acoustic phenomena in the column? The problem is specifically defined as modeling acoustic reflection for three layers at normal incidence.
Click to see Photograph of Water Column Probe
Click to see photograph of Water Column Probe
A Water Column Probe consists of transducer, a tube (usually plastic) filled with water, and a nonpermeable membrane covering the tube's open end. Sound is produced by the transducer and tramsmitted through the water to the object analyzed.
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