The research, plainly
Banbury and Berry tested cognitive work against realistic background noise — office chatter, speech, general din. Performance on memory and reasoning tasks dropped measurably, and people barely noticed the drain. The noise collects its tax whether or not you feel it paying.
The receipt: Banbury & Berry, 1998
What it means for events
Sound bleed between spaces isn't an annoyance; it's a content downgrade. The breakout separated from the expo floor by a curtain is running its workshop at a cognitive discount — and both rooms are paying.
Where to run it
Room assignment
Real thinking gets real walls. Put the workshop far from the party, not adjacent to it.
Expo design
Acoustic zoning: demo theaters with actual sound isolation outperform open stages on comprehension, not just comfort.
Hybrid & broadcast
The remote audience pays the noise tax double — mic discipline and room treatment are content quality decisions.
Seen in the wild
Related concepts
Now use it
Score your own event against principles like this one — or make the whole vocabulary official.
Score your event Get certified