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  2. Sonova - Wikipedia

    en.wikipedia.org/wiki/Sonova

    Phonak Holding AG was founded in 1985 as a holding company for the Phonak Group. In 1987 corporate headquarters were moved from Zurich to Stäfa . The company was floated on the SWX Swiss Exchange in 1994 and renamed Sonova Holding AG on 1 August 2007, although this change applied only to the holding company and in parts to the subsidiaries ...

  3. Microfiltration - Wikipedia

    en.wikipedia.org/wiki/Microfiltration

    Microfiltration is a type of physical filtration process where a contaminated fluid is passed through a special pore-sized membrane filter to separate microorganisms and suspended particles from process liquid.

  4. Micrometer (device) - Wikipedia

    en.wikipedia.org/wiki/Micrometer_(device)

    Diagram of a micrometer showing a measurement of 7.145 mm ± 0.005 mm A micrometer is composed of: Anvil : The shiny part that the spindle moves toward, and that the sample rests against.

  5. Volume control - Wikipedia

    en.wikipedia.org/wiki/Volume_control

    Volume control can refer to: Volume controlled continuous mandatory ventilation; Potentiometer, a feature on audio equipment for adjusting the sound level

  6. Micropump - Wikipedia

    en.wikipedia.org/wiki/Micropump

    The compression ratio of the micropump as one of the critical performance indicator is defined as the ratio between the stroke volume, i.e. fluid volume displaced by the pump membrane over the course of the pump cycle, and the dead volume, i.e. the minimum fluid volume remaining in the pump chamber in pumping mode. [15]

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  8. Electret microphone - Wikipedia

    en.wikipedia.org/wiki/Electret_microphone

    Electret materials have been known since the 1920s and were proposed as condenser microphone elements several times, but they were considered impractical until the foil electret type was invented at Bell Laboratories in 1961 by Gerhard Sessler and James West, using a thin metallized Teflon foil.

  9. Micromanipulator - Wikipedia

    en.wikipedia.org/wiki/Micromanipulator

    Positioning test probes onto a microchip Electrophysiological setup. Micromanipulators are used to position microelectrodes. Movement reduction can be performed by mechanical levers, hydraulically using pistons of different diameters connected by tubing containing non-compressible fluid, electronically using stepper motors or linear actuators, or combinations of techniques in one instrument.