In Reply to: Anyone Like to explain how this works? posted by PAR on December 15, 2016 at 07:15:15:
If the cylinders are made of a material that physically distorts when a voltage is applied, then it's a variation on the piezoelectric transducer. I worked at a place where we used much smaller cylinders as hydrophones in water.
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Follow Ups
- It could also be piezoelectric. - Bry 16:42:50 12/15/16 (0)