New ask Hacker News story: Ask HN: Hearing aids embedded in walls of house that track people's movements?

Ask HN: Hearing aids embedded in walls of house that track people's movements?
2 by amichail | 1 comments on Hacker News.
So instead of having someone wear a hearing aid while at home, you would have speakers in a house that amplify certain frequencies towards only those individuals who need such amplification. Is such a thing possible? Has it been done?

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