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This is just plain ignorance by someone who clearly is not hearing impaired himself.

I, on the other hand, have profound hearing loss, almost to the level of being actually deaf. I wear hearing aids because I rely on them as much as you rely on your legs and arms. Without my hearing aids, I cannot understand what people say, unless they use sign language.

Gimmick or not, I will certainly use this feature for detecting my door bell. It’s one of the things I can’t hear without my hearing. I think it’s really worth testing. As with everything Apple develops, it’ll become more reliable in the future.
Not sure what you are on about. I said most hard of hearing people do or should wear a hearing aid. You said you wear them so we seem to agree (at least in your case). I said with Apple's wide disclaimer its new iOS feature is a gimmick which may work in some cases. You said whether gimmick or not, you will use it. So no argument there. I hope it does prove useful for you.
 
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