Sony's futuristic Xperia Ear Duo headphones are now up for pre-order in the US. The headphones allow listeners to hear both music or voice overs at the same time as being able to hear ambient sounds around them.
https://www.notebookcheck.net/Futuristic-Sony-Xperia-Ear-Duo-headphones-up-for-pre-order-ship-May-25.301734.0.html