A speech therapy pilot project in Cornwall has been awarded £250,000 by the National Institute for Health Research.
The Seeing Sound project will test a method which uses a computer to show the tongue movements of children.
The Electropalatography treatment helps the child to modify the movements of their tongue for particular sounds, with clearer sounding speech.
It will be tested over the next two-and-a-half years.
NHS Cornwall and Isles of Scilly's Lucy Ellis, chief investigator on the project, said: "I am delighted that the project has received this fantastic grant.
"Improved communication in hearing impaired children is of fundamental importance in helping them with their social lives, ensuring that they flourish at school and in making emotional attachments to those around them."