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Possibly by detecting resonance on a membrane through nerve signals. Sound is vibrations in the air, and when those waves run into things you get vibrations. Human skin is sensitive to sound to...
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#1: Attribution notice removed
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System
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2021-03-30T23:53:17Z (about 3 years ago)
Source: https://worldbuilding.stackexchange.com/a/49033 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/