Story My son was born in 2012. With 2 years we began to notice that he understands and hardly speaks. Nearly a year has passed, that he was diagnosed with Sensorineural hearing loss, 2nd degree. I was interested what he and other people can hear with partial hearing loss. As a result, there is a mobile app to understand it. How to I did no medical tests. When I modified my voice through the app, I heard the myself like my son spoke. The microphone must be placed at a distance from the speaker You want to test. To adjust the audiogram, use the Setup button or finger gestures on the grid of audiogram. I recommend to use headphones. Features - user- friendly design - manual or gesture settings - You can use the app without any additional devices. But I suggest to use headphones. - You have to place microphone at the distance you want to test. I suggest 1-4 meters. Speech zone. I'm glad to hear any comments and suggestions how to improve the App.