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They power up when you put them in your ear!
  [vote for,

A small feature meant to save battery and keep ears free of obstruction when not in use. These bluetooth buds will answer a call when the right bud is put into the ear. The user may keep the left one in or put into a left pocket, but the buds will only power up and answer a call when the right one is inserted in the ear. Temperature?
minoradjustments, Dec 01 2019

Peltier powered https://medium.com/...arbuds-aef841a2a113
[2 fries shy of a happy meal, Dec 01 2019]


       Intriguing [+]
8th of 7, Dec 01 2019

       I've never used battery-powered buds, but the idea of using temperature to turn them on sounds good. [+]
MaxwellBuchanan, Dec 01 2019

       Here's a blog from a guy trying to actually make thermoelectric ear buds which require no external power source. [link]   

       Baked. If you look at Lt. Uhura's earpiece, you'll see it has a prominent finned portion. This is the external heatsink for the Seebeck-effect thermopile that powers it.   

       The unit activates automatically when inserted into an ear canal.   

       That's different from the concept currently under discussion.
8th of 7, Dec 01 2019

       [2fries], heat to electricity is the Seebeck or Thermocouple effect; the Peltier effect is the reverse - current to heat-pumping.
8th of 7, Dec 01 2019

       Oh, I haven't looked up Pelttier yet.
I've only gotten as far as the D's in the Everythingictionary, but this guy specifically mentions using Peltier plates as a power source for ear buds.

       Peltier devices can be used "backwards" to generate electricalenergy.
8th of 7, Dec 01 2019


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