Hear, Hear! An App for Cochlear Implant Users

Summer 2014


Today, more than 325,000 deaf people around the world are living with cochlear implants (CI). These tiny electronic devices don’t restore normal hearing, but they provide a useful representation of sounds, making it possible to understand speech. Many people, however, face challenges learning to use cochlear implants, largely because auditory training opportunities are limited.

Now three Whiting School undergraduates have come up with an iPad app to expand access to auditory training, allowing deaf adults with CI to practice on their own.

Their work is overseen by Tilak Ratnanather, an associate research professor in the Center for Imaging Science who was born deaf but learned to communicate using hearing aids. Ratnanather received a cochlear implant in 2012, and he knows firsthand the trials of learning to use it.

“With a cochlear implant, it is not the same as normal hearing. It’s electrical hearing. … You have to train the brain to interpret the signals,” says Ratnanather.

Unfortunately, many adults with cochlear implants don’t have access to auditory training, or their insurance companies don’t provide coverage for it.

“I’m fortunate because I work at Johns Hopkins,” he says. “I go to the clinic once a week for an hour, and I’ve been doing that for two years. Some people only get one or two in-person training sessions a year.”

That’s where Speech Banana comes in. The app, named for the region on an audiogram where all the phonemes of spoken languages fall, doesn’t replace in-person auditory training. “But we want to supplement it,” says Margo Heston, a junior biomedical engineering student.

The student team, which also includes junior Rohit Bhattacharya and sophomore Joanne Song, has a version of their app in beta testing with about 50 adults worldwide. They plan to make it available to the public later this year in English, and they hope to secure funds to translate it into other languages.

Heston says the team has put in hundreds of hours on the project so far, and while they received research credit last summer, they now consider it a personal calling. “This has real tangible potential to improve a person’s functionality,” she says.