Using the sense of touch through sensory substitution you can pass information to the brain that is interpreted as visual or audio information. Devices have been developed that send touch signals in the form of electrotactile or vibrotactile signals to different parts of your body. BrainPort uses encoded electric current to represent information which is sent via the tongue to the brain where it’s interpreted as visual information. In studies it has allowed blind people to “see” objects with their tongue well enough that they can stop a ball moving towards them. Another device that uses sensory substitution is a vest that sends vibrotactile signals to the torso which gets interpreted by hearing impaired people as sound.

The brain doesn’t seem to be prewired to interpret the electrochemical signals originating from the ears and eyes. Instead it learns to interpret these signals as sound and vision over time. In a similar way the brain can learn to interpret other types of input signals as sound or sight.

It’s also possible to create new information channels by implanting electronic components directly into the brain or to the nervous system. To avoid invasive surgery the sense of touch can instead be used to create new information channels. A device that does just that is the biohack device North Sense. North Sense is placed on the skin of your chest and vibrates whenever you are facing magnetic north.

The examples of sensory substitution and some biohacks show that it is possible to send any type of information to your brain via the sense of touch.