The hi-hat consists of two cymbals that are mounted on a stand, one on top of the other, and clashed together using a pedal on the stand. A narrow metal shaft or rod runs through both cymbals into a hollow tube and connects to the pedal. The top cymbal is connected to the rod with a clutch, while the bottom cymbal remains stationary resting on the hollow tube. The height of the top-cymbal (open position) is adjustable.
When the foot plate of the pedal is pressed, the top cymbal crashes onto the bottom cymbal (closed hi-hat). When released, the top cymbal returns to its original position above the bottom cymbal (open hi-hat). A tension unit controls the amount of pressure required to lower the top cymbal, and how fast it returns to its open position.[2]
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