• Echo Dot@feddit.uk
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    1 day ago

    It’s just a low pass filter. Since human speech is massively out of the frequency range of a fan, you can just delete that whole frequency wholesale.

    • HackerJoe@sh.itjust.works
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      12 hours ago

      Audacity (or Audition/Cool Edit how the old guys know it) is a bit smarter. It can analyze a recording of the noise floor and then just attenuate that. It’s bad for quality music but good enough to improve speech, old tape recordings and records.