The superior capacitive sensors can't go under your screen yet, and ultrasonic technology is still relatively new and expensive. Thus the optical scanner saw a resurgence in popularity.

What this means is that the Vivo X Fold's fingerprint sensors could work like almost no other sensors out there. You will be able to use them even if your fingerprints are messy, like when your ...

Wind direction can be calculated by taking velocity readings from two ultrasonic sensor pairs perpendicular to each other and using a bit of simple trigonometry.