The Home Audiometer Hearing Test turns your PC into a machine that can test your hearing at home through standard headphones. This test gives a very good indication if there is a hearing problem or not and how severe it might be and is much more accurate than other 'Do-it-yourself' tests with a CD or no means of calibration. The accuracy of this audiometer is within about 10 dB of the true hearing level, compared to around 5dB of a professional