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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.
Other methods of data collection can be scarily effective. Stores have identified people were pregnant before they knew.
Very likely they identified you as someone that could have that condition, and you noticing the ads after talking to your doctor is a form of recency bias.
You can collect almost all the same data from traditional surveillance methods. Collecting and processing mocrophone data just isn't effective enough to make up for the massively increased costs from processing it.
It displayed the ad before I could get home and research it. It had only been discussed out loud and in person.
Did you connect to the clinic's WiFi?
Just being near their WiFi is enough.