> a way to passively activate the mic Two comments: 1) I would not be using the singular, even if there is just one mic that you can turn on-off. From an a

> a way to passively activate the mic Two comments: 1) I would not be using the singular, even if there is just one mic that you can turn on-off. From an audio perspective it makes perfect sense with extra microphones to measure ambient noise levels in order to improve quality in the consumer-operated mics and speakers. Also, in case the phone has some voice-enabled "assistant" feature that you can just speak to by name, like, eh, Google/Siri? 2) I would not blindly assume that you, as a user, can dictate which of these microphones are turned on/off, or when. But then, that's just me.