What Sounds Are the Most Annoying to Humans?

Gizmodo.com asked a bunch of sound experts to name the sound that humans find most annoying. And here are some of their responses.

1.  Vomiting.

2.  Things our neighbors do that we can't control, like construction or throwing a party.

3.  Chalkboard scraping.

4.  A loud artificial heart valve, which creates a loud, permanent sound coming from your body . . . even when you're trying to sleep.

5.  Voices of people you've been stuck with during the pandemic.