2 Royalty-Free Audio Tracks for "Quiet Mumble"

Crickets chirping while college students can be lightly heard in the background. Recorded with a condenser mic.

The only way to get good classroom ambiance is to record it in a classroom. That's exactly what this is. Recorded in a classroom as the students were studying and the teacher was quietly walking around. You'll hear a few random noises, some papers shuffling, some very muffled dialog, an air conditioner in the background.