So, this is not quite correct. Talking across it means that you are aiming your voice to the side of the microphone, but the microphone is still aimed directly

So, this is not quite correct. Talking across it means that you are aiming your voice to the side of the microphone, but the microphone is still aimed directly at your mouth. It’s not the directionality of the microphone that is an issue, it’s the air coming out of your mouth.