The ear is like a biological equivalent of a USB port. It is unparalleled not only as a point for “writing” to the brain, as happens when our earbuds transmit the sounds of our favourite music, but also for “reading” from the brain. Soon, wearable devices that tuck into our ears—called hearables—will monitor our biological signals to reveal when we are emotionally stressed and when our brains are being overtaxed. When we are struggling to hear or understand, these devices will proactively help us focus on the sounds we want to hear.
Source: IEEE Spectrum
Picture: Anders Wenngren