This is of a 29-year-old woman called Sloan Churman, who has been deaf since birth. She has had a hearing aid implanted in her ear. This was the moment it was switched on.
I almost titled this post: The things I should never take for granted. Just now, I can hear birdsong outside my window. Normally, in the middle of a working day, I would not especially notice. After watching this, I notice.