As the father of two deaf sons and the author of a book on the history of cochlear implants, I thought I knew a bit about hearing problems. I was still shocked by an e-mail I received some months ago.
SARASOTA — The clanking of a fork on a plate, the rustling of paper, the jingle of keys or the soft purr of a car engine can be excruciating for those suffering severe hyperacusis. The rare hearing ...
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