L.A.
Does your daughter know her name? If you ask her "What is your name?" will she tell you?
If you stand behind her(without her knowledge) speaking in a normal voice and say her name, will she turn to look at you or respond?
Can she say basic words like milk, no, mommy, daddy? If she sees a dog or cat, will she try to say dog or cat?
If you ask her where is your bed, where is your hand? Can she point and let you know she understands?
To help develop her vocabulary and to help with her comprehension read to her. Ask her questions about the book, point out everything to her. Teach her colors.
Some one year olds are not very verbal. But if she is having hearing problems, it is easy to test on your own. Just speak in normal tones behind her back or while you are in the car and she is in her car seat. Ask her questions and see if she responds.
Play with blocks, ask her to stack the red ones, the blue ones. Ask her where her favorite toy is. Have her show you where her room is, ask her where the kitchen is. At the grocery store tell her the names of all of the fruit and veggies.