iCanHear gives you 12 high pitched sounds that only certain people, depending on their age can hear. iCanHear gives your the frequencies of each sound, but also the age in which you must be below in order to hear the sound.
You can use iCanHear to do many things. Whether you want to annoy your peers or test your hearing, iCanHear is a great utility and fun for all ages.
Note: Due to the fact that the the last three sounds have such high frequencies, you will most likely not be able hear them, unless you are very young, or the volume is very high.
Additionally, be careful when using this application. If you play the tones to loud, especially when you have headphones on, you can quite possibly damage your ears.