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We see how much implants have changed in the last twenty years andÌýfind out howÌýMichael's mum struggled to raiseÌýthe money and support for an operation previously unavailable in the UK.

We'll also be catching up with 27-year-old Thea Kyle who had her cochlear implant operation in adulthood. We followed Thea through the stresses and strains ofÌýher operation, and we were there when she heard the sound of her voice for the first time. Eighteen months later we go back to visit her, to find out what impact the implant has had on her life.

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