This article was taken from the October 2014 issue of Wired magazine. Be the first to read Wired's articles in print before they're posted online, and get your hands on loads of additional content by subscribing online.
American ecologist and hearing specialist
Caitlin O'Connell-Rodwell is developing a new hearing aid inspired by elephants. Along with sound, elephants pick up ground-based vibrations, as the skin of their feet and trunks contains mechanoreceptors that can sense them. "We [humans] have the same ability to detect vibrations, but people with normal hearing don't focus on it," says O'Connell-Rodwell.
She has partnered with HNU Photonics, a research company based on Maui, Hawaii, to develop a patch that adheres to the skin; this transduces sound into vibrations, which the brain interprets as a kind of Braille or Morse code. When participants touch the device, tiny electromagnets vibrate. Mechanoreceptors sense the vibrations, and send signals to the brain.
It turns out that the vibrotactile sense of the hearing-impaired is more pronounced than that of people with normal hearing, because their brains process the stimuli in the unused auditory cortex. "There's a big population that is underserved... and could benefit from the same use of vibrations as elephants."
This article was originally published by WIRED UK
