A look at solid-state speakers etched from silicon and their potential applications, like helping people with hearing loss and making AR/VR objects feel real (Christopher Mims/Wall Street Journal)

Christopher Mims / Wall Street Journal:
A look at solid-state speakers etched from silicon and their potential applications, like helping people with hearing loss and making AR/VR objects feel real  —  Speakers the size of an asterisk have the potential to change the way we reproduce sound, cope with hearing loss—and even make objects in virtual reality feel real