Sound Components (Buzzer)Pin Type Piezoelectric Sounders: Request to Prohibit the Insertion of Foreign Objects into the Sound Emission Hole

This may cause deformation of the piezoelectric sounder or cracking of the piezoelectric ceramic, resulting in unstable sound.

The piezoelectric sounder produces sound waves from the oscillation of the piezoelectric diaphragm, via the sound emission holes in the acoustic housing, so it is not sealed from the environment.
If a foreign object is inserted into the sound emission hole, and it touches the piezoelectric diaphragm, this is likely to cause the following failures.