Ultrasound is a prank application with which you can play strange sounds and play pranks on your friends. The top 10 ultrasonic pranks include dynamic and smooth sounds. Try one of the five and choose your favorite! Just press the buttons and see what happens!

Turn on popular school jokes and have fun with your classmates, but remember! If you hear a sound, then it cannot be ultrasound. Only cats and some animals can hear it. Ultrasonic waves have frequencies higher than the upper audible limit of the human ear.