This program is designed to use your subconscious mind to instruct your body to improve your ability to hear. Similar to the Improve Your Eyesight program, we suggest you use it for 6 months and have hearing tests done before and after (although we suspect you'll notice an improvement without one!).
Some types and degrees of hearing impairment may not be able to hear subliminals. Ultrasonic format is recommended for those with difficulty hearing.