Post #1203840
2026-04-08 09:46 UTC
@dec23k @moz
Yes, traffic is what I used to use it for.
But one day a guy wandered across botany road in right front of me. He thought he was about to be hit by a truck.
Replies (1)
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@dec23k@mastodon.ie 2026-04-08 10:00
@SuperMoosie @moz I like how the possibilities in the research included mechanical (possibly wheel-powered) air sirens. I have used a hand-crank air siren; there's a lot of stop and start needed! But regular DTMF tones played loud over a Bluetooth speaker might be close enough - the number 6 includes 770hz and 1477hz. The higher tone is just a courtesy to make it sound more like a bicycle bell; it's not critical for ANC. 666 FTW anyone?