VIBRATION

MOVEMENT OF A PENDULUM OR OSCILLATING BODY BETWEEN TWO EXTREME POSITIONS (A’ AND A”).
THE BALANCE OF A MECHANICAL WATCH GENERALLY MAKES FIVE VIBRATIONS PER SECOND, EQUIVALENT TO 18,000 VIBRATIONS/HOUR (2.5 HZ). A MORE ACCURATE MECHANICAL WATCH MAKES 10 VIBRATIONS PER SECOND OR 36,000 VIBRATIONS/HOUR (5HZ). A QUARTZ WATCH MAKES 64,000 VIBRATIONS PER SECOND ( 32 MHZ).
AN OSCILLATION (« TICK-TOCK ») EQUALS TWO VIBRATIONS (ALTHOUGH OSCILLATION IS SOMETIMES INCORRECTLY USED TO REFER TO A VIBRATION).