The term 'Finger-Tapping Sound' can be summarized as a rhythmic sound created by tapping one's fingers on a surface. The crossword solution for this term is 'THRUM, ' which is a low, continuous humming or buzzing sound. This sound is often associated with stringed instruments such as guitars and banjos, but it can also be created by tapping one's fingers on a surface. Finger-tapping sound is often used in music to create a rhythmic beat or accompaniment.