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I still don’t think companies serve you ads based on spying through your microphone
(simonwillison.net)
This is a most excellent place for technology news and articles.
Perhaps they track who you talk to and show you ads that are relevant to those people, or their best guess based on two profiles.
I don't think there's a data center out there with a live audio stream of literally billions of always-on devices 24/7/365.
Perhaps there's some local processing first, but devices have permissions for apps, and lights that indicate the mic/camera is in use.
I figure someone would have figured it out by now (reverse engineering, decompiling code), or someone from Google/Apple/Samsung would have leaked it if it were true. Think of the number of people required to keep this secret.
And yet my android phone is able to detect what song is playing 24x7 without being a noticeable drain on the battery or using extra data. Doesn't seem far fetched to be able to do keyword spotting under the same constraints.
Here's one example of a company getting caught: https://m.economictimes.com/news/international/us/next-time-you-talk-on-your-phone-be-careful-facebook-and-google-are-listening-to-your-conversations/articleshow/113071827.cms