These smart earbuds are volume knobs for the real world
 

Your choices for filtering the sounds around you are typically quite limited: you either have to drown it out (such as through earplugs or headphones) or let all the annoyances in. Doppler Labs might soon have a way to be more selective, though. Its ...

http://www.engadget.com/2015/06/02/h...=rss_truncated