Action on Hearing Loss Logo
    Total results:
    Search
      Total results:

      Scientifically Speaking

      Dr Rachael Richardson is a Senior Research Fellow at Melbourne’s Bionics Institute. We’re funding Rachael to investigate if we can improve how well cochlear implants work using light. In her blog, Rachael tells us about why she works in hearing research and what she hopes to achieve.

      By: Dr Rachael Richardson | 18 May 2018

      At the moment, cochlear implants (CIs) convey speech and sound by electrically stimulating auditory neurons. The cochlear implant has up to 22 electrodes that are positioned in the cochlea. These separate out sounds according to their pitch.

      In the cochlea there are usually thousands of sensory hair cells doing this job, each one responding to a slightly different pitch. So, for someone using a cochlear implant, it’s harder to separate out different sounds – making it difficult to follow conversation when there is background noise, or to listen
      to music.

      We’re hoping that, by using electrodes that fire tiny beams of focused light at the auditory nerve, rather than electric currents, we’ll be able to stimulate the auditory neurons more precisely. Cochlear implants can deliver pitch information to the cochlea because the nerves in our ears are arranged much like piano keys. Those at one end of the cochlea (or keyboard) receive low-pitch sounds and those at the other end, high-pitch sounds. But the electric current emitted from implant electrodes to activate the nerves, or press the keys of the piano, ripple out just like dropping a stone in some water. This ‘spread’ of activation means that a single electrode may activate a mix of low and high-pitch nerves at the same time. Imagine what listening to music would sound like when this happens!

      If we can overcome this spread of activation in the cochlea, we can come closer to conveying not just pitch information but the full richness of complex sound – such as a piano.

      I love the way cochlear implants have helped people with hearing loss to communicate, interact, work and learn. It would be exciting if we could go further to enable hearing in the presence of competing background noise, appreciation of music and other complex sounds.

      I enjoy the applied science nature of my current research – I enjoy having a problem to solve, I like that the outcomes are tangible, I love that there is a real chance of a discovery that is game-changing for science and for people with a cochlear implant.

      Action on Hearing Loss has been enormously supportive over the past 10 years. One thing that really makes your UK-based charity stand out is that you fund cutting-edge research projects, no matter where they’re based in the world. Action on Hearing Loss also funded my research into gene therapy for protecting and regenerating the sensory cells in the cochlea. The overall aim is to be able to reverse hearing loss – how amazing would that be!

      One thing that really stands out for me is the potential for gene-editing technologies to treat certain forms of genetic hearing loss. Scientists are already seeing prevention, or reversal, following gene therapies in animal models. I believe that we’ll be seeing similar, promising results in clinical trials in the near future, whether from gene therapies, stem cell therapies or from pharmaceutical treatments. 

      I started my career doing molecular-based cancer research. While this was fascinating and rewarding, I’d say to anyone thinking of working in the hearing research field that I’ve not regretted my move. I’ve found people working in this area to be collaborative and, with organisations like Action on Hearing Loss around, there is important support for researchers.

      Any kind of research requires a cohesive team who all have a role in advancing knowledge that can be developed into treatments for people to live better. I’m lucky to be working with internationally renowned scientists in neurophysiology, neuroscience, physiology and optical science.

      My ultimate goal is to be an integral part of that team that gives better hearing to people through advances in cochlear implant technology – and therapies for the protection and regeneration of the ear’s sensory cells.

      Find out more about cochlear implants at: www.actiononhearingloss.org.uk/how-we-help/information-and-resources/publications/hearing-aids-and-cochlear-implants/cochlear-implants/

      The Bionics Institute, Australia

      In medicine, ‘bionics’ means the replacement or enhancement of organs, or other body parts, by mechanical versions. Bionic implants mimic the original function very closely – or even surpass it.

      Rachael Richardson says, “At the Bionics Institute, we’re passionate about multidisciplinary research and product development that leads to clinical outcomes that improve lives.

      “We’re focusing on improving outcomes for people with hearing loss and we’re exploring a range of new devices for the alleviation of symptoms associated with neurological disorders and inflammatory conditions.”

      Go to: www.bionicsinstitute.org

      Find out more

      We depend on your donations so we can fund the best hearing and tinnitus research around the world. Donate today and help us continue our vital work into hearing treatments, so that people can live life to the full again.

      You can find out more about the research we’re funding in our biomedical research section.

      If you’re interested in finding out more about our research, sign up to receive our Soundbite e-newsletter. It’s a monthly email, filled with the latest news about hearing and tinnitus research.

      Recent Posts

      Can brain activity tell us how well a child can hear with their cochlear implants?

      Researchers in Nottingham are developing a new way to tell how well young children and babies can hear with their implant, by looking at their brain activity. We’re funding PhD student, Faizah Mushtaq, to develop a tool that could help children with cochlear implants. Faizah tells us more about her exciting research and how you can help.

      By: Faizah Mushtaq
      18 September 2018

      Detecting sound is easy - the hard bit is getting a machine to know what it means

      Whether it’s the sound of a doorbell, or complex speech patterns, sound recognition technology will transform everyone’s lives - including people with hearing loss and deafness. Kevin Taylor, our Product Technologist, tells us more.

      By: Kevin Taylor
      17 September 2018

      Treatments for hearing loss: What’s new?

      Over 20 treatments to restore or protect hearing are currently in clinical trials. If they are successful and pass all three stages of these trials, the way we manage hearing loss could change significantly. Our Translational Research Manager, Dr Carina Santos, tells us the good news.

      By: Carina Santos
      14 September 2018

      How to stay safe and independent at home

      If you, or a loved one, can’t hear the doorbell, phone, baby monitor or smoke alarm, one simple solution will offer total peace of mind. The Bellman Visit paging system will alert you to important sounds around the home so you can stay safe and independent.

      By: Sally Bromham
      06 September 2018

      Recent Posts

      Can brain activity tell us how well a child can hear with their cochlear implants?

      Researchers in Nottingham are developing a new way to tell how well young children and babies can hear with their implant, by looking at their brain activity. We’re funding PhD student, Faizah Mushtaq, to develop a tool that could help children with cochlear implants. Faizah tells us more about her exciting research and how you can help.

      By: Faizah Mushtaq
      18 September 2018

      Detecting sound is easy - the hard bit is getting a machine to know what it means

      Whether it’s the sound of a doorbell, or complex speech patterns, sound recognition technology will transform everyone’s lives - including people with hearing loss and deafness. Kevin Taylor, our Product Technologist, tells us more.

      By: Kevin Taylor
      17 September 2018

      Treatments for hearing loss: What’s new?

      Over 20 treatments to restore or protect hearing are currently in clinical trials. If they are successful and pass all three stages of these trials, the way we manage hearing loss could change significantly. Our Translational Research Manager, Dr Carina Santos, tells us the good news.

      By: Carina Santos
      14 September 2018

      How to stay safe and independent at home

      If you, or a loved one, can’t hear the doorbell, phone, baby monitor or smoke alarm, one simple solution will offer total peace of mind. The Bellman Visit paging system will alert you to important sounds around the home so you can stay safe and independent.

      By: Sally Bromham
      06 September 2018

      More like this

      As the largest charity for people with hearing loss in the UK, we understand how hearing loss can affect everything in your life from your relationships, to your education and...

      It’s Deaf Awareness Week 2018 from 14–20 May. Download and use our free posters, communication tips cards and fingerspelling cards to help increase deaf awareness in your office, school or...

      We're really proud of everyone who's a part of Action on Hearing Loss, and hope you'll feel inspired to become a part of our community.​