Ever catch yourself letting out a frustrated sigh, a squeal of delight or maybe a gasp of terror? These off-the-cuff vocalizations are called vocal bursts. And in a new study, researchers from the University of California, Berkeley have mapped out a record number of them.

To start things off, the researchers asked 56 people, some professional actors and some not, to react to different emotional scenarios. From these reactions, the team recorded more than 2,000 vocal bursts. Next, they