Earlier quoted context omitted.
Microphones connected to power and internet 24/7 have been in people’s houses since the 1990s (or earlier, if you consider the phone network to be equivalent). Yet it only became “creepy” when they started talking back. This tells me it’s an emotional response, not rational.
Cell phones, even now, can't be doing that much background processing unknownst to us, because they are connected to a battery, battery life is a big deal in a highly competitive industry, and we'd all notice if they drained very quickly. ISTR there are documented instances of law enforcement and/or intelligence doing that sort of thing to phones, and the battery drain causing it to get noticed. Hooking it up to an o…
Google's actual smartphone line (Pixel) ships with passive song recognition, default disabled. I enabled it because I was curious and it sips so little power that I left it on, but to function it has to be listening to the audio all the time so that it can say to itself "Hey, that is Sabotage by the Beastie Boys".
It doesn't use the network, or the screen (unless you power the screen on to find out what you're listening to) but it passively remembers every recognisable song it heard, essentially forever. So that means it is _listening_ it just doesn't tell anybody about it.