"We figured out where Daphne's hearing loss is very specifically and figured out what sounds she could say and what sounds she couldn't say," she says.
She laughs about the process of getting the accent just right.
"I made my entire family crazy because I wanted it so badly. I did the accent every day for three weeks and by the end my poor boyfriend was just like, 'Ahhh!'"
"Switched at Birth" airs Mondays (8 p.m. EDT).
Alicia Rancilio covers entertainment for The Associated Press. Follow her online at http://www.twitter.com/aliciar