Beltone's Silica one-channel digital circuit gives you maximum amplification for the soft sounds you want to hear, like the sound of a child's voice. It also provides minimum amplification for the loud sounds that you may find distracting. Most hearing aid wearers have a hard time hearing soft sounds, yet hear loud sounds just fine. The problem is, ordinary hearing aids provide one preset increase in volume. They amplify all sounds the same. This often makes loud sounds too loud. The Silica circuit is more comfortable to wear because it treats loud and soft sounds differently. This sophisticated digital circuit gives more amplification to help you hear soft, high-frequency sounds. It also automatically adjusts to keep loud sounds from becoming too loud and uncomfortable.