Between 10 and 15 months, she should be able to point to a familiar object in a picture book when asked. If there's no response to any of these tests, consult your doctor or health visitor. Since the vast majority of babies have excellent hearing, it's probably just a temporary loss caused by a cold . Or she may simply be too engrossed in something else to take notice. She may also have temporary hearing loss during an ear infection.
Hearing helps children learn about the world and communicate.
Popping in a CD or turning on the radio. Children love music, so if it seems appropriate, point out the tinkling of the piano and the clanking of the cymbals. Talking to your child and reading to her. Nothing stimulates a child's intelligence more than hearing you talk. Don't endlessly bombard your child with words, but if she seems interested, tell her what you're doing.