I meant "hours" cumulatively, so their brain is ignoring all the background stuff that is competing for our attention in these short clips because it's all nove

I meant "hours" cumulatively, so their brain is ignoring all the background stuff that is competing for our attention in these short clips because it's all novel stimulation to us. Drownings in progress are often quiet, but that doesn't mean there aren't useful audio cues (splashing that stops, a kid who is no longer laughing or shouting, etc)