Are smartphones listening to us? mobile phone fot. pexels.com "Apps constantly pick up ultrasonic sounds from the environment" "This is the method of ultrasonic tracking on devices. Apps on ...

Now, let’s talk about this ultrasonic tech that’s flying ... Push that to “mute†your device or keep it from listening. Just remember to unmute it when you want to chat with ...

He turned to two common ultrasonic sensors and Python to do the ... the left hand and the other for the right. This allows the device to react to single hand gestures that get closer or further ...