Sonic shower
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. (; )

Sonic showers were present aboard Federation starships at least as early as the 2270s. () 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. ()

In 2364, a woman was found frozen to death by Geordi La Forge in the sonic shower aboard the  with all her clothes on. ()

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

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. () A decoupler was the standard device used for checking sonic shower relays. (; )

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. () 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. ()

One of the ways in which Benjamin Sisko occupied himself when the  was on its way to Ajilon Prime in 2373 was to check the sonic shower relays. ()

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. ()

In 2375, visiting Kadi  Tomin could not use the sonic showers aboard the  as they only washed with purified water, necessitating the installation of an ablutionary fountain in his quarters. ()

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. ()

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Life support technology