To describe the ticking of a clock, most people say it makes a “Tick Tock” sound. You can also describe a clock as making a “Tick Tick Tick” sound, which can be considered a more accurate description since many modern clocks don’t actually make the “Tock” sound.
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Regardless of what your brain thinks, the clock makes one sound – TICK. But since your brain likes to organize repeating sounds into musical passages, you hear TICK-tock TICK-tock.
Typically the second tone in a repeating pattern is assigned a lower pitched note by your ever-helpful brain.
Listen to “Tick Tock Sound” below;