Dragon Dictation is an easy-to-use voice recognition application that allows you to easily speak and instantly see your text or email messages. In fact, it’s up to five 5 times faster than typing on the keyboard.
Ive used this app quite abit before but it could be an amazing tool for someone who is completely deaf. This is relying on both parties being competent at reading and writing. Many people who are deaf from birth can often have poor literacy skills (http://www.bbc.co.uk/news/education-26240043). Still this tool could be very helpful, with SCOPE estimating 10 million in the UK suffering with hearing impairment (1 in 6). https://www.scope.org.uk/support/families/diagnosis/hearing-impairment.