The Sony LinkBuds WFL-900 are here. Sony designed them to be worn at all times by allowing sound to travel into your ears during wear.
With earbuds and other sets of headphones, the whole point is to turn the outside world off. You want to turn off sounds from the outside so you can hear your music, podcast, or phone call as clearly as possible. However, in our hyper-connected world, multi-tasking is a central aspect of our day.