equilibrium equilibriumthe rest position of the particles in a medium Related Articles: Glossary: amplitudeGlossary: particle motionGlossary: CycleGlossary: stressTutorial: What is Sound?Science Tutorial: What is Sound?How fast does sound travel?What is sound?Tutorial: Speed of SoundScience Tutorial: Sound Speed Derek Sutcliffe2017-02-26T20:09:58-05:00