I have one of these TV's; they have a feature where you can push a microphone button to issue voice commands. I'm assuming this is to do with what's picked up

I have one of these TV's; they have a feature where you can push a microphone button to issue voice commands. I'm assuming this is to do with what's picked up while the voice command prompt is active, which is when you push the button. I don't think that the TV actively listens at all times, unless someone has evidence to that effect.