Is it proven Google uses mic without consent?

It's known, Googled Android is a privacy nightmare. From all the ways to juice all your data mic is among the most concerning because it knows everything not only you, but others say to profile them. But it's all speculation and I don't remember an article linking your voice activity with shown ads. I saw such experiment on TV on a privacy section and only once, searching further didn't pop up anything proven, so I can't prove it wasn't their …

consent google mic privacy