My CAG started masking "hello" sounds at about 9 months. In some respects of course he sounded like me in the morning, but he was saying hello. In short I had to wonder for awhile if he had something wrong with his voice. He just plainly turned one year and has added "pretty bird" to his vocasbulary and a few other words he`s only said once, like "I want" and my name. He`s also picked up the sirens from the fire trucks that go by. Unfortunately, when he was younger, the power went out and my cordless phone beeped all night. That`s mostly what I hear all day every day... beep beep beep.