University of Melbourne cochlear implant study

8 September 2015

A world-first study of deaf primary school students has revealed children with double cochlear implants performed much better on exams than children with only one.
The University of Melbourne study, released for Hearing Awareness Week (August 23–29), measured academic performance of 44 profoundly deaf 8-year-old children across Australia and New Zealand.

University of Melbourne Audiology School
One cochlear ear can give a child the gift of hearing, but a new study shows two can help them excel at school (Photo credit: University of Melbourne)

Children using bilateral cochlear implants achieved significantly higher scores for maths, oral language and written language. And the younger the child had received the second implant, the bigger the improvement.
As a result of this research, the New Zealand Government now fully subsidises bilateral cochlear implants. There is still work to be done in Australia to achieve this.
Children with profound hearing loss have historically learned at about 55 to 65 per cent of the rate of children with normal hearing. They tend to fall behind further every year they are at school.
Bilateral (two) cochlear implants can be a huge benefit to those children, yet this operation is not publicly funded in Australia.
Dr Julia Sarant from the university’s Department of Audiology and Speech Pathology, is lead author of the new study. She says it’s vital the Federal Government follow New Zealand’s example and fund double implants, to allow hearing impaired children the best chance at school.
“Cochlear implants are not cheap. One implant costs just over $30,000. But they make such a huge difference to the lives of children,” Dr Sarant said.
“With two ears, the brain can use the auditory information from each ear to compare and process sound. Two implants give children the chance to locate different sounds, identify who is speaking in a group, and filter out background noise, even in noisy places.
“With only one ear, children find learning very difficult because they tend to miss information amongst the constant buzz of the classroom and in the playground.
“Low literacy, unemployment, social isolation, and depression can be lifelong repercussions of poor academic outcomes. It is crucial that our research leads to better government funding policy and best clinical practice.”
In Australia, to get a second implant, parents need to have private health insurance, or they need a discretionary decision made to dip in to those government funds allocated for single cochlear implants, if there are enough.
The study was conducted in partnership with the University of Melbourne’s Department of Audiology and Speech Pathology, Cochlear Ltd and The Royal Victorian Eye and Ear Hospital.

Audiology at the University of Melbourne

Melbourne Audiology School’s audiology program focuses on developing professional skills through a large program component of comprehensive clinical training. Clinical skills are supplemented by coursework and lectures that introduce students to graduate-level research methods, while maintaining a strong level of scientific acumen expected of students in the health sciences at the University of Melbourne.
Program: Master of Clinical Audiology
Location: Parkville campus, Melbourne, Victoria
Semester intake: February
Duration: 2 years
Application deadline: October 31, 2015

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Find out more about studying at Melbourne Audiology School. Contact OzTREKK’s Australian Audiology Schools Admissions Officer Jaime Notman by emailing, or phone toll free in Canada at 1-866-698-7355.