schweben

noun
  1. In music, a term used to describe a specific type of vibrato or oscillation effect, often associated with the sound produced by certain musical instruments or voices. noun
    The organist used a Schweben effect to add richness to the hymn.
    The violinist's Schweben added a haunting quality to the performance.
  2. In physics, particularly in acoustics, it refers to the phenomenon of beats, which are the periodic variations in amplitude resulting from the interference of two sound waves of slightly different frequencies. noun
    The Schweben between the two tuning forks was clearly audible.
    Musicians often use Schweben to tune their instruments more precisely.