• Kalkaline @leminal.space
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      3 months ago

      Dog whistles technically aren’t quiet, they are out of the audible frequency for humans, but dogs can perceive them because their hearing range goes beyond the 20k Hz range that is the upper limit for human ears. Sort of like how we can feel the heat from infrared light we just can’t see it, but point an infrared camera at the light source and it’s bright.