Sonic shower
- Hygenic device used in lieu of water bathing
- Allows for resource conservation, avoiding the need to store large amounts of water
- Generates sonic pulse vibrations to dissolve dirt, dead skin, and other debris (VOY: "Juggernaut")
- Invented by 2270s (Star Trek: The Motion Picture)
- Handheld units serve similar fashion (DS9 Novel: Mission Gamma: This Gray Spirit)