I agree music has this effect, but I think the Fence is mostly because it also hugely influences the mood of the gathering, i.e. of the type and correlatedness of people’s emotional states.
(Music also has some costs, although I think most of these aren’t actually due to the music itself and can be avoided with proper acoustical treatment. E.g. people sometimes perceive music as too loud because the emitted volume is literally too high, but ime people often say this when the noise is actually overwhelming for other reasons, like echo (insofar as walls/floor/ceiling are near/hard/parallel), or bass traps/standing waves (such that the peak amplitude of the perceived wave is above the painfully loud limit, even though the average amplitude is fine; in the worst cases, this can result in barely being able to hear the music while simultaneously perceiving it as painfully loud!)
I agree music has this effect, but I think the Fence is mostly because it also hugely influences the mood of the gathering, i.e. of the type and correlatedness of people’s emotional states.
(Music also has some costs, although I think most of these aren’t actually due to the music itself and can be avoided with proper acoustical treatment. E.g. people sometimes perceive music as too loud because the emitted volume is literally too high, but ime people often say this when the noise is actually overwhelming for other reasons, like echo (insofar as walls/floor/ceiling are near/hard/parallel), or bass traps/standing waves (such that the peak amplitude of the perceived wave is above the painfully loud limit, even though the average amplitude is fine; in the worst cases, this can result in barely being able to hear the music while simultaneously perceiving it as painfully loud!)