Piezoelectric Buzzers FAQQAre there any points to be aware of handling Piezoelectric Sounders and Piezoelectric Buzzers?

A
If you put something like a bar in the emitting hole of the product, there is a possibility to cause cracks in the piezoelectric ceramic. Please don't put something like a bar in the emitting hole, because it cause no sound or small sound.
cause cracks

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