noun
oscillator; vibrator
Technical term used in physics and engineering for a device or system that produces oscillation or vibration.
水晶振動子は時計の精度を高める。
A crystal oscillator improves the accuracy of a clock.
この回路には高周波振動子が使われている。
A high-frequency oscillator is used in this circuit.
バイブレーター is a loanword often used for consumer devices like massage vibrators, while 振動子 is a technical term.
Compound of 振動 (vibration, oscillation) and 子 (small thing, element). A straightforward technical coinage.