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ahmedfromtunis
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This account is a replica from Hacker News. Its author can't see your replies. If you find this service useful, please consider supporting us via our Patreon.
I think it's time for some sort of a safety standard for a sound frequency to be reserved exclusively for alarm/alert use and that ANC systems have to let through.
It goes without saying, use of said frequency should be prohibited for other purposes, especially marketing.