Bone conduction is the conduction of sound to the inner ear through the bones of the skull. The sound travels directly to the cochlea instead of having to go through the eardrums first. Thus we hear through two different avenues – the eardrums and through our skull with bone conduction.
People who hear TOO well with their bone conduction tend to have sensitive hearing and hypersensitive senses (sensory processing problem). Good examples are people who are picky eaters, cannot stand labels in their shirts, hate certain noises and get car sick easily.
The bone conduction headphones have a small piece under the padding of the top of the headphones that vibrates with low frequencies. The extra vibration helps correct the hypersensitivities of people with poor sensory processing, helps people be more alert to their environment and helps normalize hearing.