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The process of separating something that is desired from something else that is undesired.

Filtering is used in many ways in both science and technology, a few are:

  • chemistry, filtering to separate a precipitate from a solution
  • electronics, filtering a power supply to separate AC "hum" from the DC voltage (low pass filter)
  • electronics, filtering a signal to separate it from adjacent signals (bandpass filter)
  • automotive, filtering air intake to separate dust from the air
  • automotive, filtering oil to separate metal wear particles and other dirt from the oil
  • lighting. color filtering
  • computing, filtering software
  • etc.
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10y ago

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