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The sonic shower was a technology that used sonic pulse vibrations to remove dirt and grime, contaminants and possibly dead skin from a humanoid body.

Sonic showers were described as relaxing. High-pitched sonic showers serve a similar effect as to what a "cold shower" serves. (DS9: "If Wishes Were Horses"; VOY: "Juggernaut")

Sonic showers were present aboard Federation starships at least as early as the 2270s. (Star Trek: The Motion Picture). The technology is presumably an excellent conservation means as it eliminates the need for water used in bathing. However various Starfleet vessels were equipped with conventional water dispensing hygiene applications such as a shower or a tub.

During the Occupation of Bajor, Bajoran comfort women were told to use Terok Nor's sonic showers for the Cardassians, who value cleanliness. (DS9: "Wrongs Darker Than Death or Night")

In 2364, a woman was found frozen to death in the sonic shower aboard the SS Tsiolkovsky with all her clothes on. (TNG: "The Naked Now")

During Wesley Crusher's first week at Starfleet Academy, Adam Martoni reprogrammed Crusher's sonic shower to cover him with mud. (TNG: "The Game")

One of the components of a sonic shower was an acoustic inverter. When an acoustic inverter broke, the sound created by the sonic shower has been described as being able to "make your hair stand on end". In 2376, Captain Janeway's sonic shower malfunctioned and the sound caused her mirror to shatter. (VOY: "Live Fast and Prosper") A decoupler was the standard device used for checking sonic shower relays. (DS9: "Nor the Battle to the Strong"; VOY: "Day of Honor")

The sonic showers on Deep Space 9 sometimes malfunctioned. Rom and Leeta's broke down in early 2374 and Ezri Dax's needed to be repaired in late 2375. (DS9: "Favor the Bold", "Extreme Measures") Miles O'Brien was going to fix the latter until he became embroiled in an elaborate search – which he and Julian Bashir carried out – for a cure for a morphogenic virus. (DS9: "Extreme Measures")

In an early revision of the final draft script of "Extreme Measures" (when the episode was titled "Night Tremors"), the detail that Ezri Dax's sonic shower was going to be fixed by O'Brien was not present. In its place was a reference to a similarly abandoned plan for Dax and O'Brien to have met at Deep Space 9's Replimat for a raktajino.

One of the ways in which Benjamin Sisko occupied himself when the USS Defiant was on its way to Ajilon Prime in 2373 was to check the sonic shower relays. (DS9: "Nor the Battle to the Strong")

Quark once claimed that one thing that would make a Human "as nasty and violent as the most bloodthirsty Klingon" would be if they did not have access to sonic showers. (DS9: "The Siege of AR-558")

In 2375, visiting Kadi monk Tomin could not use the sonic showers aboard the USS Voyager as they only washed with purified water, necessitating the installation of an ablutionary fountain in his quarters. (VOY: "Someone to Watch Over Me")

In 2376, Seven of Nine canceled a singing lesson with Neelix because she felt that his vocal cords were incapable of producing basic diatonic tones and he had other rhythmic shortcomings. Neelix complained that he sounded good in the sonic shower, and Seven suggested he confine his efforts to that location. (VOY: "Pathfinder")

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