The most annoying sound it causes headache
with this app you can play the annoying in various frequencies . this annoying sounds will drive them crazy. it can also be used as a hearing test or frequency generator as it contain many hertz (hz) values ; people older than 25 years cannot hear this sound when played with more than 15000hz
*****do not use it with headphones ****
*****do not use it with headphones ****
