Cell-based Neurotrophin Delivery With Cochlear Implantation For Long-term Rescue Of Auditory Neurones Following Deafness
Funder
National Health and Medical Research Council
Funding Amount
$437,212.00
Summary
This project aims to develop safe and effective techniques for long-term delivery of drugs to the ear by genetically modifying cells so they release the theraputic agents over extended periods of time, and then to use encapsulation techniques to safely deliver these cells to the inner ear in combination with a cochlear implant.
Evaluating Perceptual Benefits Of Bilateral Cochlear Implants For Young Children And Infants
Funder
National Health and Medical Research Council
Funding Amount
$452,843.00
Summary
The cochlear implant (bionic ear) has revolutionised communication for children with profound hearing loss. Nevertheless, children with the standard single implant still face huge challenges in educational and social settings. Difficulties include understanding speech that is soft, or speech in noisy environments, such as the classroom. Also, with one implant, children cannot locate the source of sound, such as the speaker in a group conversation, team-mates during sport, or an oncoming car. Res ....The cochlear implant (bionic ear) has revolutionised communication for children with profound hearing loss. Nevertheless, children with the standard single implant still face huge challenges in educational and social settings. Difficulties include understanding speech that is soft, or speech in noisy environments, such as the classroom. Also, with one implant, children cannot locate the source of sound, such as the speaker in a group conversation, team-mates during sport, or an oncoming car. Research with other normal hearing and hearing impaired groups suggests that two (bilateral) implants may possibly improve performance in these conditions. Although hundreds of children worldwide have received bilateral implants, very limited evidence is available to indicate whether two implants are significantly better than one, especially for young children. The main aim of the research is to evaluate the improvement in listening performance when young children and infants use two implants as compared with one. An additional aim is to gain clinical knowledge of bilateral implant use in order to develop selection criteria and management protocols for young bilateral candidates in the future. Results of this research will determine if bilateral implants should become a standard option for young children at the RVEEH-University of Melbourne Implant Clinic. The results will be published and presented internationally to influence clinical practice worldwide. All children using a cochlear implant, or in need of one in the future, will benefit as the study outcomes will indicate the best choice of hearing devices for individual children, and help to determine best-practice management if bilateral implants become an option for all children.Read moreRead less
Hybrid Optical-electrical Stimulation For Precise Neural Stimulation
Funder
National Health and Medical Research Council
Funding Amount
$935,579.00
Summary
In world-first research, we have evidence that combining electrical stimulation with optical stimulation significantly and safely improves precision of neural activation for devices such as cochlear and retinal implants. In this proposal we will use gene therapy to make nerves responsive to light in pre-clinical animal models to establish proof of concept that hybrid stimulation will significantly improve outcomes for recipients of cochlear and retinal implants.
Improving Speech Perception Outcomes In Deaf Adults And Children Using Cochlear Implants
Funder
National Health and Medical Research Council
Funding Amount
$160,604.00
Summary
This project aims to further improve on speech understanding by deaf adults and children using the cochlear implant. In particular, we aim to individually modify the speech coding scheme on the basis of the basic hearing skills of the subject. In this manner, more speech information should be available and the users will likely gain more benefit from their cochlear implants. The speech processing strategy of the multiple-electrode cochlear implant, manufactured by the Australian biomedical compa ....This project aims to further improve on speech understanding by deaf adults and children using the cochlear implant. In particular, we aim to individually modify the speech coding scheme on the basis of the basic hearing skills of the subject. In this manner, more speech information should be available and the users will likely gain more benefit from their cochlear implants. The speech processing strategy of the multiple-electrode cochlear implant, manufactured by the Australian biomedical company Cochlear Limited, codes acoustic frequency information on electrodes which are located in the cochlea. The assignment of frequencies to electrodes is consistent with the ordering of pitch in the cochlea. For optimum performance, all electrodes would need to be perceptually distinct from each other. Recent research with adults and children has shown that this is not the case for a number of subjects as adjacent electrodes sound the same. Thus important speech information may not be heard by these subjects. In this project, we will determine how well adults and children are able to hear differences between the electrodes, and then provide speech processing schemes which exclude those electrodes which sound the same as others in close proximity. The project will compare these modified strategies with the standard strategy currently used by the subjects over time, so that any differences in the way adults and children are able to improve on speech understanding will be determined. As far as can be determined, this project will be the first investigation to improve on speech understanding in children using the cochlear implant.Read moreRead less
Development And Evaluation Of A New Cochlear Implant Sound Processing Strategy Utilising A Spike-based Temporal Auditory
Funder
National Health and Medical Research Council
Funding Amount
$98,000.00
Summary
This project aims to improve cochlear implant users’ perception of speech, particularly in noisy environments, by developing a new sound processing strategy that is based on the human physiological response to sound. To date, cochlear implant sound processing strategies have been designed using simple engineering principles. Our new strategy simulates the behaviour of the cochlea and the auditory nerve to give a stimulation sequence closer to normal hearing. This project will demonstrate the fea ....This project aims to improve cochlear implant users’ perception of speech, particularly in noisy environments, by developing a new sound processing strategy that is based on the human physiological response to sound. To date, cochlear implant sound processing strategies have been designed using simple engineering principles. Our new strategy simulates the behaviour of the cochlea and the auditory nerve to give a stimulation sequence closer to normal hearing. This project will demonstrate the feasibility of this approach and show the level of benefit that is provided over existing cochlear implant processing strategies. This project aims to implement the STAR strategy and evaluate its effectiveness for cochlear implant users in comparison to existing commercially available strategiesRead moreRead less
The research will investigate the mechanisms by which our brains are able to listen selectively to sounds of interest in competing background noise. This will be investigated in normal hearing subjects, those with partial deafness and in profoundly deaf patients who use a cochlear implant. If deaf patients can learn to use cues to enhance detection of sounds of interest this could have an impact on the effectiveness of hearing aids and cochlear implants in noisy listening situations
The project aims to improve cochlear implant performance via integrated gene therapy. A neurotrophin gene cassette will be delivered to cells adjacent to the electrode array using electrical pulses. This drives regeneration of the auditory nerve fibres and considerably improves cochlear implant performance. This study will optimize the therapeutic gene construct and cochlear implant –based gene delivery controller, and undertake an initial clinical trial to evaluate safety and efficacy.