STMicroelectronics and USound, a fast-growing audio company, have delivered the first silicon micro-speakers resulting from their technology collaboration announced last year. Engineering samples are now with lead customers, and trade demonstrations will take place during CES 2018 in Las Vegas.   These speakers, expected to be the thinnest in the world and less than half the weight of conventional speakers, enable wearable tech such as earphones, over-the-ear headphones, or Augmented-Reality/V...