Always been sensitive to sounds and have taken effort over my life to protect my hearing. It may look silly, but I still plug my ears when a large truck/train passes by.
Result is, even at my age, I can still hear those annoying high frequency teenage repellents (ubiquitous in Tokyo). Can also hear some of my electric devices charging.
I'm glad to see such steps being taken by Apple. I always bring my noise canceling buds (Sony, Apple) with me when I go see movies. It's literally painful to watch movies in modern theaters without them. Just too damned loud!
Apple's on the right track. Personalized health and more daily monitoring of said health is gonna be a sea change event.
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