Electromagnetic hydrophone with tomographic system for absolute velocity field mapping

What is it about?

The velocity and pressure of an ultrasonic wave can be measured by an electromagnetic hydrophone made of a thin wire and a magnet. The ultrasonic wave vibrates the wire inside a magnetic field, inducing an electrical current. Previous articles reported poor spatial resolution of comparable hydrophones along the axis of the wire. In this study, submillimetric spatial resolution has been achieved by using a tomographic method, and a physical model is presented.

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Why is it important?

These characteristics show this technique as an alternative to standard hydrophones.