The Rhythmic Phantom Of Music
A ghost note is a musical sound that you feel rather than hear as a specific pitch. While it has a precise rhythmic pulse, its intended volume is so quiet that the actual tone disappears.
Musicians use ghost notes to create a sense of forward motion and texture without cluttering the melody with extra tones. By hitting an instrument very lightly, they create a percussive click that acts like a rhythmic glue. It is a subtle secret used by drummers and guitarists to make a groove feel alive and effortless. Listen closely to funk or jazz, and you might hear these rhythmic whispers driving the beat.
Source: Ghost note