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Cochlear Implant Technology

If you're interested in the latest information on cochlear implant technology, you've found it! The links below will take you to information on all the latest CI technologies.

Here's the scoop on totally implantable CIs

And here's the latest on hybrid CIs

Oh, and here's information on bilateral CIs

For information on other CI technologies, please have a look at the links below.

February 2000 - The cochlear implant workshop presented by the California School of Professional Psychology (CSPP) in February 2000 included a rather technical cochlear implant discussion by Robert Shannon PhD, who is Director of the Auditory Implant Research Laboratory at the House Ear Institute. Here's an article summarizing the technical information.

April 2000 - Dr. Bruce Gantz of the University of Iowa announced an experimental high frequency cochlear implant that operates only on the high frequencies, which is the area in which many people have the majority of their hearing loss. The residual low frequency hearing loss is unaffected. 

July 2000 - Ever wonder what speech might sound like with a CI? Check this out for a CI Sound Demonstration.

November 2002 - ACS Gets Patent for New CI Technology

June 2003 - Is an analog CI superior to a digital CI?

August 2003 - Interested in the latest thinking regarding how a person's hearing history affects their speech understanding with a CI? Then check out Dr. Shannon's workshop from the SHHH convention.

October 2003 - Researchers are starting to talk about second generation cochlear implants. One that uses MEMS technology may be just a few years from commercialization.

February 2005 - Dr. Robert V. Shannon of the House Ear Institute discusses the factors affecting speech recognition for CI users. This is a VERY interesting article!

September 2005 - We've long been told that a person having a CI should have the better ear implanted. It turns out that may not be correct!

January 2006 - Want to show your hearing friends how the sound of a cochlear implant (CI) changes as the number of channels increases? This CI simulator from the PBS website does exactly that. Here it is! 

January 2006 - CI Technology Timeline

February 2006 - New CI Electrode Array Technology Promises Improved Hearing

March 2006 - New Cochlear Implant Promises Improved Performance

April 2006 - Professor developing PDA-CI Interface

June 2006 - UI Cochlear Implant Center Contributes to CI Advances

January 2007 - NIDCD-funded Research Explores Use of Laser to Stimulate Auditory Nerve

January 2007 - An MP3 player for the deaf

August 2007 - Light-Based CI Might Outperform Today's Technology

September 2007 - Cochlear Implant Work at UW

October 2007 - Aculight developing optical cochlear implant

December 2007 - Rutgers Discovery Offer Potential for Improved Cochlear Implants

March 2008 - Doctor Maps CI from Halfway Around the World

March 2008 - Should you consider upgrading the INTERNAL CI components?

March 2008 - Researcher Aims to Improve CI Performance in Noise

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CI Sound Demonstration

July 2000

One of the questions often asked of people who use hearing aids or cochlear implants is what things sound like using those devices. I'm not really sure I believe that people who don't use them can really know how they sound, but there are demonstrations available of how scientists think they sound.

One such demonstration of the sound quality of cochlear implants is available at: www.utdallas.edu/~loizou/cimplants/. This site provides demonstrations of how implants might sound with different numbers of channels. It also demonstrates how the depth of electrode insertion influences the sound quality. Very interesting for those of you with usable hearing, or for your hearing friends and family to get some idea of the sound quality a cochlear implant can provide.

BTW, there's lots of other good information at this site. While you're there, take a minute and poke around.

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MEMS CI on the Way?

October 2003

Editor: Ever heard of MEMS? Well, neither had I, until I saw an article in Fortune talking about potential future applications of this technology. "MEMS" is the abbreviation for Micro-Electro-Mechanical Systems, and it's creating quite a stir within the experimental medical community. One of the potential applications is a second-generation cochlear implant. Here are a couple of excerpts from the Fortune article. For the full article, please point your browser to: http://www.forbes.com/asap/2001/0402/052a.html

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"Deafness is a treatable situation," proclaims Kensall "Ken" Wise, professor of electrical engineering and computer science at the University of Michigan at Ann Arbor. "In the next 20 years, most deafness will disappear." With funding from the National Institutes of Health (NIH), Wise is developing a second-generation cochlear implant based on MEMS that he expects to be commercialized in about five years.

The first MEMS neural implant to reach the market will likely be for deafness. At the University of Michigan, Wise's device uses a MEMS electrode to interface with neurons responsible for translating auditory signals. The array is threaded into the inner ear of a deaf person, where it relays "sound" to the brain. Currently, non-MEMS devices have been implanted in about 30,000 people, but Wise expects MEMS to improve hearing sensitivity, enabling someone to pick out speech in a crowded room or hear a much more natural version of music.

 

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CI Technology Timeline

January 2006

Here's a timeline of inventions and discoveries on the road to today's cochlear implants. The timeline begins in 1800, and continues through 2004.  Full Story

Sounds of innovation

 

March 2006

 

A group of University scientists recently developed a new hearing aid device which will allow users to hear a higher-quality sound than existing technology permits. The device is called a cochlear implant - a type of hearing aid implanted in a spiraled, snail-like structure in the ear called the cochlea. Full Story  

 

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Light-Based CI Might Outperform Today's Technology

August 2007

About 100,000 profoundly deaf people now hear with cochlear implants, which work by stimulating the auditory nerve with a string of electrodes implanted in the inner ear. While the devices enable many users to converse easily and use telephones, they still fall short of restoring normal hearing. Now scientists at Northwestern University are exploring whether laser-based implants could one day outperform today's electrical version. The mammalian ear uses neural firing rates as one way of encoding sound. As part of a project funded by the National Institute for Deafness and Other Communication Disorders (NIDCD), Claus-Peter Richter and his colleagues at Northwestern have demonstrated that they can control firing rates in the auditory nerve of animals using infrared laser radiation. They are now trying to establish that it's safe to use for long periods of time and that it can manipulate neural firing rates with enough precision to send useful information to the brain.  Full Story

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Doctor Maps CI from Halfway Around the World

March 2008

Through the power of Internet technology, medical experts in New York have switched on an inner-ear device, allowing a man in Uganda to hear for the first time in two years. Activating the device from halfway around the world is a first, and highlights a trailblazing way in which the growing realm of telemedicine - conducting medical procedures from remote locations - can enhance the lives of people in struggling nations.  Full Story

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Should you consider upgrading the INTERNAL CI components?

March 2008

YOU could call it the upgrader's dilemma. When it comes to buying a new mobile phone, computer or DVD player, should you buy the latest and greatest model now, since it offers new features that your old model lacks? Or should you wait for the next version of the technology that will be along next year and threatens to make today's gear seem suddenly old-fashioned? Now imagine that upgrading the item in question requires you to have surgery. That, in a nutshell, is the predicament that people with cochlear implants may soon be in. As many as 120,000 people are now thought to have had their hearing restored by these revolutionary devices, which turn sound waves into electrical signals that stimulate the auditory nerves in the ear via an implanted electrode, and are perceived as sound. But several new developments promise big improvements to the technology in the coming years, so existing users could face tough choices as they have to decide whether to undergo surgery to reap the benefits.  Full Story