While you may expect it to sound more akin to a room full of people who all think they're right trying to shout louder than each other, it turns out Wikipedia actually sounds rather beautiful.
Created by Stephen LaPorte and Mahmoud Hashemi, follow this link to hear what it sounds like. It's what happens if you take Wikipedia's recent changes feed and turn it into audio. The pair explain what you can hear:
Bells indicate additions and string plucks indicate subtractions. Pitch changes according to the size of the edit; the larger the edit, the deeper the note. Green circles show edits from unregistered contributors, and purple circles mark edits performed by automated bots. You may see announcements for new users as they join the site, punctuated by a string swell. You can welcome him or her by clicking the blue banner and adding a note on their talk page.