What is Project Aura?
From: Pocket-lint

Google Project Aura has been revealed. The team working on Project Aura wants
to use bone conduction technology. This is conduction of audio to the inner
each through the vibration of bone in the skull.

Read the entire article at:
http://www.pocket-lint.com/news/135970-what-is-google-project-aura-everything-you-need-to-know

Links:
Google's 'Project Aura' could be the beginnings of the next Glass
http://9to5google.com/2015/09/16/google-project-aura

Here’s a first look at the logo for Google's forthcoming Project Aura
http://9to5google.com/2016/01/13/heres-a-first-look-at-the-logo-for-googles-forthcoming-project-aura