"Background chatter" refers to the low conversations or noise happening around you that you might not be actively listening to or paying attention to. Full definition
That required a lot of additional dialogue, even though most of it ends up as ambient background chatter. (philly.com)
In one study, University of Wisconsin - Madison psychologist Richard Davidson put long - term meditators and people with no meditation experience into fMRI scanners and piped in either emotionally charged sounds, such as the cry of a woman in distress, or neutral sounds, such as background chatter in a restaurant. (discovermagazine.com)