A smartphone - linked hearing aid is a particular advantage for people with profound hearing loss, as they tend to rely on video - calling apps, which provide additional visual speech cues. (newscientist.com)
Overall, severe to profound hearing loss in both ears affects 1 to 3 per 1,000 live births. (sciencedaily.com)
Or you might not be deaf, but you're raising a child with profound hearing loss. (raisingchildren.net.au)