The Apple pencil and future iPhone displays could eventually include ultrasound tech

Earlier today, a recently-published patent filing in the US provided a glimpse at how Apple could improve the experience of wearing headphones. But now two new filings have popped up which point towards the future use of ultrasound technology in its devices.

Starting off with smartphone and tablet displays, it seems Apple is looking into adding ultrasonic technology to its panels eventually in the hope of improving sensitivity. This would be achieved by placing multiple layers on top of an acoustic touch panel. For those unaware, this type of panel uses transducers to transmit ultrasonic ...