Joanne Milne experienced the world as a soundless place. Deaf for the first 39 years of her life, everything changed after she had cochlear implant surgery. The procedure enabled sound vibrations to rouse her auditory nerves. A nurse’s voice was the first noise she heard, and the experience brought her to tears. She said, “Hearing things for the first time is so, so emotional, from the ping of a light switch to running water. . . . I can already foresee how it’s going to be life-changing.”