What's that sound?

So I am looking for information on death rates and I find a page on the CIA website, but the data does not make any sense to me. So I go looking for an explanation, which eventually leads me to their home page. The page comes up and the title starts showing up one character at a time:

CENTRAL INTELLIGENCE AGENCY

But what's that sound? Could it be a typewriter? The CIA is using typewriters? Of course, I could only get it to play once. Now they are listening to me.