Ultrasonic sounds are high-frequency sound waves that exceed 20,000 hertz, a range far beyond what the human ear can detect.

Check out the Avnet element14 challenge In Reach! It's an "Ultrasonic Sensor Sensing Challenge" for building smart mowers and ...

The SRF01 is a popular ultrasonic sensor used primarily for range finding applications. [Jaanus] discovered that they had a few flaws, including not working after being dropped. The faulty ones ...

A new invention has proven that audio can successfully be transmitted directly to a listener's ears without being audible to others around.

Here are five creatures with superior hearing abilities that can detect and interpret ultrasonic frequencies: Dogs can hear ...