A few calls included definite non-office noises in the background. And some have no background noise, and seem extremely quiet. Which is not what I imagine a call center to sound like either.
I dunno. I work in a call center, and boy, sometimes it DOES sound like there are a bunch of little kids in the background! Understand, they're mostly men in their twenties - but sometimes it's hard to concentrate on the customer with all the distractions!