CHAKRABARTI: I use my earbuds every day because I want to know what's happening to my brain as I play with my daughter, hang out with my cat, listen to music, work. TAN LE: This is Tan Le, co-founder and CEO of EMOTIV, one of a new crop of companies that see great potential in BCI or brain computer interface technology. Le says that fundamentally we do not believe in how companies have transacted with data in