Janine Roebuck’s life was changed when she received double cochlear implants Sign up for our free Health Check email to receive exclusive analysis on the week in health Get our free Health Check email Get our free Health Check email Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice An opera singer who concealed her deafness for over three decades has hailed "life-changing" surgery that could revolutionise care for thousands