Hearing Test allows user to test his/her hearing or listening ability with respect to age.
App generates your desired frequency sound by which a human will be able to hear that frequency. By the passage of time (human age) human's listening power getting worse so children are able to listen higher frequency as compare to elders.
Easy to use: Just set your desired frequency and increase volume gradually so you can hear a tone.
Also You can check your hearing frequency range in table w.r.t. age.