Welcome to the Piezo SHOCK Show #29. There are so many reasons why resonance in ultrasonic transducers is awesome. The reason I speak about in this video is that they provide a purely resistive load to your drive circuit, thereby allowing the drive circuit to efficiently drive it. Otherwise, you'd be stuck providing more current and voltage for the same displacement, even if the power dissipated from the transducer is the same.

Watch this video and be DAZZLED.

Watch the episode here: https://youtu.be/n_Hf0J3pXWc

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I've posted the video notes below: