The Tooth Phone is a wireless audio communications device that, through bone resonance, will allow humans to seamlessly communicate to anyone, at anytime, in any environment. People will no longer have to wear uncomfortable speaker and microphone devices, nor will they have to worry about crowded or high noise environments. Instead, the Tooth Phone provides a completely transparent way of communicating, one that is free of head or ear-mounted systems, enabling natural universal connectivity.

Using patented bone conduction technology, the Tooth Phone represents the first and only truly personal communication system. Specifically, the Tooth Phone picks up individual bone resonances, allowing sound to be transmitted solely from the user regardless of the environment. Similarly, only the user hears speech, as bone resonances do not leak and cannot be heard by anyone else.
When you speak, your skull bones vibrate a very small amount (less than 0.1 micron -bone conduction sound). By attaching the Tooth Phone to a rigid object, your tooth, it is capable of detecting these tiny movements and converting them into electronic signals. Unlike traditional microphone technology, the Tooth Phone does not respond to air conduction sounds - only bone conduction sounds, causing surrounding noise that exists in the air to go unheard. Due to the fact that the human skull provides isolation (about 40 dB SPL) from the surrounding (air) noise, an extremely loud noise is required to actually vibrate the skull.

To provide hearing, the Tooth Phone reverses the procedure. While still using the same bone conduction principle, the phone receives a speech signal and generates a small vibration. These vibrations are transmitted via the bone conduction pathway to the nerve in your inner ear. Unlike a typical headset, the Tooth Phone does not block the air conduction pathway, allowing your ears to remain open for conversational speech and sound localization.
Homeland Security Expo
On July 10, the Tooth Phone was discussed on CNN by Senator John Kerry (D-Mass) in a live feed from the Homeland Security Expo from Capitol Hill. Many participants of the Expo said the Tooth Phone represented a new approach to solving the problems of voice communication in high noise environments and under firefighter masks.