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282 points elsewhen | 1 comments | | HN request time: 0.204s | source
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distantaidenn ◴[] No.41910529[source]
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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nikolatt ◴[] No.41911281[source]
Wait, those high frequency sounds in Tokyo are teenage repellents? I thought they are bird/insect repellants. I could hear the sounds and was literally getting mini headaches walking around.
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1. ipnon ◴[] No.41912419[source]
Yes you can even adjust the frequency based on which demographics you want to keep from loitering. There is a predictable hearing loss curve for the highest frequencies. You could set it to 20kHz to keep little kids away, or even go as low as 16kHz if you want to keep everyone younger than about college age away. This also happens to be an easy way to test the degree of your own hearing loss compared to your age group.