C.S.
My son, from birth, snored louder than my husband. We could hear him through the wall next door. Also, he had a deep voice (for a baby) and mumbled when he talk. When he was 2 he was referred to an ENT who determined his tonsils were way too big and they had to be removed. He hasn't snored since. Ask your pediatrician to check her tonsils. Best of luck!