She says on her YouTube channel that she's worn hearing aids since she was two years old and has gotten by on reading lips. Churman goes on to explain the background behind her clear speech:
"My whole life I've been complimented on how well I speak. I don't really have an answer for you other than I have always had a passion for reading, grammar, and English. My hearing loss was/is considered severe to profound. I've worked very hard to be able to interact and blend in...Only thing I can say is 'God is good.'"
Read more at http://www.naturalcuresnotmedicine.com/2013/11/deaf-woman-hears-herself-for-first-time.html#4I2tPOqVSJKDLmsP.99