With a standard old HC-SR04 ultrasonic sensor, an audio module and a servo to drive a custom gauge needle he’s made a device which can warn people around you if they’re too close for comfort.

Sensor Sense: Eliminating ultrasonic cross talk May 10, 2007 Proximity sensors that use ultrasonic sound waves calculate distance to an object using the time it takes to receive the echo from an ...

Each sensor constantly scans the environment using ultrasound to detect anything closer than 60 feet. As an object moves near, the sensor sends a message to a controller box that calculates the ...

With the Pixel 9, Google is finally making the switch to an ultrasonic fingerprint scanner. The specific unit used is Qualcomm’s 3D Sonic Gen 2 (QFS4008) — the same exact model as the Samsung ...

The ultrasonic fingerprint reader sat underneath the display, letting Samsung stretch the screens across the entire front of its devices. The only problem was the 3D Sonic Sensor didn't quite live ...

The reports claim that Apple plans to use Qualcomm's ultrasonic fingerprint sensor technology in at least one iPhone model set to be released in 2020, although the timeframe could be pushed back ...