Ultrasound Prank description

Ultrasound is a comic application with which you can play strange sounds and make fun of your friends. The ultrasound pranks include dynamic and smooth sounds. Try one of five and choose your favorite! Just click on the buttons and see what happens!

Include popular school jokes and have fun with classmates, but remember! If you hear a sound, then this 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.