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stand of the tide’, which is when tide levels ‘stand’ at a maximum or minimum
Isn’t that when it’s just standing at high or low tide?
Some googling leads me to find it’s either “ebb tide” or “flood tide” depending on whether it’s halfway falling or halfway rising, respectively. I’m not sure if this is exactly half way though, some diagrams make it appear that any time in between in either one of these, not necessarily half way exactly.
I really doubt they’re listening to your microphone. Constantly uploading your audio would be noticeable in bandwidth and constantly analyzing audio on device would kill your battery - at least currently.
What this demonstrates is how good tracking by other methods is getting. You don’t need to listen to someone’s microphone when you know what they and their friends/coworkers are looking up online and likely bringing up in conversation. It’s trivial to fingerprint someone and track near everything they’re looking up online, and even if you’re privacy conscious, many of those you associate with share their contact list with every app that asks for it. This makes suggesting things your friends are looking up pretty easy. Add a bit of confirmation bias to the mix and you’ve got this “listening to the microphone” theory, because you’re not counting the number of times an ad isn’t something you’ve been recently discussing.