Audiometer

My eldest girl do no have hearing problem, however each time when I call her, she will only reply me after few calls from me. Many times I have to go to in front of her and tell her what I want from her. My hubby told me that this girl lack concentration type, so I have to call her come to me, and I have to talk to her face to face. Sometimes I wonder shall I get her an audiometer to hear how well she can hears. LOL