Science writer Lydia Denworth's son was diagnosed with moderate to profound hearing loss around 2 years old
Science writer Lydia Denworth's son was diagnosed with moderate to profound hearing loss around 2 years old. She explores hearing, language and the brain in her new book, "I Can Hear You Whisper: An Intimate Journey through the Science of Sound and Language." "CBS This Morning" contributor Lee Woodruff reports.
