As such a "beat" consists of multiple drum strokes occurring over multiple musical beats while the term "drum beat"[1] may also refer to a single drum stroke which may occupy more or less time than the current pulse.
Many drum beats define or are characteristic of specific music genres.
Many basic drum beats establish the pulse through alternating bass (on the on-beats) and snare drums (on the off-beats) strokes while establishing the subdivision on the ride cymbal (thus its name) or hi-hat: This establishes a quarter note pulse in (quad)duple time: each measure is formed from (two groups of) two quarter note pulses, each pulse divided into two eighth notes.
Despite the difference in notation, there is no difference in interonset intervals and this pattern is nearly identical to the first simple duple pattern except for the second onbeat being divided into two eighth notes and the second backbeat being delayed an eighth note.
The heavy metal gallop, named for a horse's canter, is based on a bass drum pattern of one eighth followed by two sixteenths.