10 links have been added on 3 ideas about #earphones.
  1. Bone conduction earphones can help people with hearing problems to listen to music, watch videos, and answer calls.

  2. Check this out! Addidas has developed self-charging headphones that can recharge using solar energy or artificial light!
    https://newatlas.com/wearables/adidas-rpt-02-sol-self-charging-wireless-headphones/

  3. You can get them on Amazon!