Noun
footpedal (plural footpedals)
A pedal (foot-operated lever).
A unique effect can be created by striking an open hi-hat and then closing the cymbals with the footpedal. Source: Internet
The hi-hats can be sounded by striking the cymbals with one or two sticks or just by opening and closing the cymbals with the footpedal, without striking the cymbals. Source: Internet