Meanings of abruptly quiet in English

The bird had stopped fanning its wings, and the crows, too, had grown abruptly quiet.

The Merlin fell abruptly quiet, his eyes falling on Ebenezar in a sudden, pointed silence.

But then she was abruptly quiet.

The Iroquois was abruptly quiet.

Islamic State's Twitter users, which have trumpeted the group's violent acts and worldview on the social media service, have gone abruptly quiet in past days.

My rising ire abruptly quieted.