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Sip-and-puff
Sip-and-Puff or Sip 'n' Puff (SNP) is assistive technology used to send signals to a device using air pressure by "sipping" (inhaling) or "puffing" (exhaling) on a straw, tube or "wand." It is primarily used by people who do not have the use of their hands. It is commonly used to control a motorized wheelchair by quadriplegics with very high injury to their spinal cord or people with ALS.
==Calibration and Setup==
Devices that use SNP technology require specific amounts of air pressure to be "sipped" or "puffed" by the user. These amounts of pressure are typically denoted as a hard sip/hard puff or soft sip/soft puff, however other terminologies might exist. Note that the words "hard" and "soft" are relative to the user and depend on their breathing abilities. Typically, air pressure levels pertaining to hard sips/puffs and soft sips/puffs are set through an initial calibration of the pressure sensor completed before the user starts to use their SNP device. With the assistance of an aid or technician, the user will program the SNP device to recognize their body's ability to produce hard sips/puffs and soft sips/puffs. Once this calibration process is complete, the SNP device will only recognize the user specific sips and puffs that have been saved into the SNP device.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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