Vocal cord clock
My clock would be set by the user varying the pitch of their singing or humming. Producing a steady tone for a few seconds (within a preset tolerance) would trigger “set” mode, and the clock would use this frequency as a reference point to move the time forward or backward according to a rising or falling pitch. Holding the pitch that corresponded to the desired time for a few seconds would fix the setting and deactivate “set” mode. Setting the time precisely would require some vocal control and might be used as a tool to improve it. Overall it’s pretty impractical- a lot of people would only be willing to use it in a soundproof room.
I’d want to to experiment with different ranges of pitch-to-time correspondence and pitch steadiness tolerances. Maybe these could both be variable by the user.
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