In 1975, Ingeborg and Erwin Hochmair started the cochlear implant development at
Technical University of Vienna with the overall goal of enabling the user not only to hear sounds but also to provide some speech understanding. Together they developed the world's first microelectronic multi-channel cochlear implant. This implant included a long, flexible electrode, which could, for the first time, deliver electric signals to the auditory nerve along a large part of the cochlea, the snail-shaped inner ear. The new multi-channel device was implanted in December 1977 in Vienna by Dr Kurt Burian. Testing various sound processing strategies with this device, ranging from single-channel quasi-analog stimulation to more complex patterns, failed to produce open speech understanding. However, when a single broadband channel with analog-style stimulation was tried, the patient showed some rudimentary speech comprehension and lip-reading support. This finding changed the direction of their research program. The Hochmairs decided that their approach in making complex microelectronic implants was premature, and they pivoted to researching simpler passive implants that were easier to construct and modify. In 1979, a passive transcutaneous four-channel implant developed by the Hochmairs allowed a woman to understand some open-set speech without lip-reading in a quiet environment. However, the speech coding strategy stimulated the best-performing single electrode rather than using multiple channels simultaneously, making this functionally closer to a single-channel approach..
3M/Vienna single-channel cochlear implant In 1981, the 3M Corporation entered into a licence and support agreement with the Vienna group involving the commercialisation of their cochlear implant system, and the device subsequently became known as the 3M/Vienna cochlear implant. However, a redesign that replaced the intracochlear electrode with an extracochlear electrode resulted in diminished speech performance, and 3M's commercial involvement ultimately ended. The Vienna group subsequently founded
MED-EL in 1990 in order to pursue a multi-channel design incorporating Blake Wilson's CIS-strategy. A
totally implantable cochlear implant is currently in development. The cochlear implant is the first device to actually replace a human sense Not only that, but it addresses hearing loss, which is number six on the list of the world's most significant disease burdens Hochmair has over 40 patents to her name, all of which are for components of her cochlear implant. Many of the patents were updated or improved versions of older components for which she filed a new patent. A fairly comprehensive, but incomplete, list of her patents are as follows: • 1999 Structure, method of use, and method of manufacture of an implanted hearing prosthesis • 1999 Device and method for implants in ossified cochleas • 2003 Implantable fluid delivery apparatuses and implantable electrode • 2003 Implantable device with flexible interconnect to coil • 2006 Implantable fluid delivery apparatuses and implantable electrode • 2006 Implantable fluid [housing] apparatuses and implantable electrode • 2007
Tinnitus Suppressing Cochlear Implant • 2007 Implanted system with dc free inputs and outputs • 2008 Cochlear Implant Power System and Methodology • 2008 Moving Coil Actuator For Middle Ear Implants • 2008 Implant Sensor and Control • 2009 Demagnetized Implant for Magnetic Resonance Imaging • 2009 Implantable device with flexible interconnect to coil • 2009 Demagnetized implant for magnetic resonance imaging • 2010 Low power signal transmission • 2010 Low Power Signal Transmission (part 2) • 2010 Tinnitus Suppressing Cochlear Implant (updated) • 2010 Moving coil actuator for middle ear implants • 2010 Implantable fluid delivery apparatuses and implantable electrode (part 2) • 2011 Implantable Fluid Delivery Apparatuses and Implantable Electrode (part 3) • 2011 Implanted system with DC free inputs and outputs • 2013 Low power signal transmission (part 3) • 2013 Low power signal transmission (update 4) • 2013 Implant sensor and control • 2014 Implant sensor and control • 2015 Implantable Fluid Delivery Apparatus and Implantable Electrode (part 4) • 2015 Cochlear Implant Electrode Insertion Support Device • 2015 Deployable and Multi-Sectional Hearing Implant Electrode • 2015 Deployable and Multi-Sectional Hearing Implant Electrode • 2016 Implantable Fluid Delivery Apparatus and Implantable Electrode • 2016 Implantable fluid delivery apparatus with micro-valve • 2017 Implantable fluid delivery apparatus and implantable electrode (part 5) • 2017 Implantable Fluid Delivery Apparatus and Implantable Electrode (part 6) • 2019 Implantable fluid delivery apparatus and implantable electrode (part 7) • 2020 MRI-Safe and Force-Optimized Implantable Ring Magnet System with an Enhanced Inductive Link • 2022 MRI-Safe and Force-Optimized Implantable Ring Magnet System with an Enhanced Inductive Link (part 2) Though she had a number of collaborators, == Publications ==