Good question. I always have a headset on when playing BFV, and I know the mic works in party chat. I can see other squad members talk, but I can never hear them at all.
@johnnyirish2It could be that they're in parties themselves potentially. I'm by no means 100% but something in the back of my mind is telling me that the flashing mic icon still shows in squad chat when you're in a party. If I get the chance today I'll test it and update as I might be talking nonsense.
*Edit: I've now tested a little bit and if you're looking at the squad menu the mics will flash if they're/you're in a party. If you're looking at squad names while playing (so down the bottom left) it'll show the solid mic item if they're/you're in a party.
