Sound Library: 12mmx12mm / 2kHz vs. 2.4kHz vs. 4kHz

Sound Library: 2kHz / 18mmx18mm vs. 12mmx12mm

SMD piezoelectric sounders play a square wave and 50%. #1 PKMCS1818E20A-R1 #2 PKLCS1212E2000-R1

0:21

Sound Library: 9mmx9mm / 4kHz vs. 4.8kHz

0:23

Sound Library: 4kHz / 12mmx12mm vs. 9mmx9mm

SMD piezoelectric sounders play a square wave and 50%. #1 PKLCS1212E4001-R1 #2 PKMCS0909E4000-R1

0:22