Breeze Audio does not use any preamps in the mic. We use the acoustic properties of the brains for preamplification. Unlike conventional bone conduction devices that use the bones in your head for amplification, Breeze uses your brain. While that may sound simple, it actually is not. The bone conduction devices amplify the vibrations of your jawbone and send that information to your inner ear. This is similar to the way conventional hearing aids which only work for certain frequencies are able to amplify vibrations in the bones of your skull. On the other hand, Breeze operates differently. It converts the vibrations of your skin into electrical signals which are sent to your brain. It is able to do this by using a proprietary firmware algorithm.