Cornell University has developed headphones that can read a person's facial expressions

The device is called a C-Face, and by recording muscle contractions, the headphones can transform facial expressions into emojis.

At New York's Cornell University, they have created unique headphones that, in addition to their primary function, are also able to follow a user's facial expressions. The gadget monitors the contractions in their facial muscles using a pair of RGB cameras attached under their ears. Surprisingly, even medical masks, which have become essential during the coronavirus pandemic, do not interfere with the functioning of the device.

Through understanding how a person's muscles contract, the system can restore their facial expressions.  Artificial intelligence then determines their primary expression, which will then be displayed using eight emojis. When using this technology to make calls, the individuals engaged in the conversation can observe each other's facial expressions, even when their cameras are turned off.